In vivo measuring system and program

Abstract

To provide a high accuracy in vivo measuring system suited to each person.SOLUTION: A simple BIA body composition meter 100 as an in vivo measuring system includes: a storage unit 110 for storing in vivo information acquired by the measurement of first accuracy as a reference value; a low accuracy measuring unit 104 for acquiring low accuracy in vivo information by inputting a measurement value acquired by the measurement of second accuracy lower than the first accuracy to a predetermined algorithm; a correction unit 112 for correcting the algorithm or the low accuracy in vivo information based on the reference value stored in the storage unit 110 and a degree of emphasis on the reference value; and an output unit 106 for outputting, as corrected in vivo information, the low accuracy in vivo information acquired by the low accuracy measuring unit 104 by using the algorithm corrected by the correction unit 112, or the low accuracy in vivo information acquired by the low accuracy measuring unit 104 and corrected by the correction unit 112.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an in-body measurement system and a program.

Background Art

[0002] Conventionally, a BIA body composition meter capable of measuring in-body information such as body water content, body fat content, and muscle mass based on the bioelectrical impedance analysis (BIA) method has been known. Since the BIA body composition meter calculates in-body information applicable to many people using a statistical calculation formula, it is excellent in tracking relative changes in an individual's in-body information.

[0003] In Patent Documents 1 and 2, as a method for measuring the amount of body fat, a method has been proposed in which the impedance between the ends of the body is measured, and the amount of body fat is calculated from the measured value and numerical values related to the body such as the height, weight, and gender of the specimen.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] When each in-body information obtained by a conventional BIA body composition meter is compared with each in-body information obtained by a highly accurate measurement method such as DXA (Dual Energy X-Ray Absorptiometry), MRI (Magnetic Resonance Imaging), CT (Computed Tomography), deuterium dilution method, 4C model (4-compartment model), there may be a slight difference in the absolute value.

[0006] Also, among BIA body composition analyzers, when comparing the body information obtained by a simple BIA body composition analyzer (for example, a single-frequency four-electrode BIA body composition analyzer, a whole-body BIA body composition analyzer) with the body information obtained by a high-precision BIA body composition analyzer (for example, a multi-frequency multi-electrode BIA body composition analyzer, a site-specific BIA body composition analyzer) that has higher measurement accuracy of body information compared to the simple BIA body composition analyzer, there may be a difference in absolute values.

[0007] An object of the present invention is to provide a body measurement system and a program for acquiring highly accurate body information.

Means for Solving the Problems

[0008] To achieve the above object, the present invention provides a body measurement system including a storage unit that stores body information obtained by measurement with a first accuracy as a reference value, a low-accuracy measurement unit that acquires low-accuracy body information by inputting a measurement value obtained by measurement with a second accuracy lower than the first accuracy into a predetermined algorithm, a correction unit that corrects the algorithm or the low-accuracy body information based on the reference value stored in the storage unit and the degree of emphasis on the reference value, and an output unit that outputs the low-accuracy body information acquired by the low-accuracy measurement unit using the algorithm corrected by the correction unit, or the low-accuracy body information acquired by the low-accuracy measurement unit and corrected by the correction unit, as corrected body information.

[0009] With this configuration, corrected body information is obtained by inputting a measurement value obtained by measurement with a second accuracy lower than the first accuracy (hereinafter also referred to as "low accuracy") into an algorithm corrected using a reference value (hereinafter also referred to as "high-accuracy reference value") obtained by measurement with the first accuracy (hereinafter also referred to as "high accuracy"). Alternatively, corrected body information is obtained by correcting the low-accuracy body information (hereinafter also referred to as "low-accuracy body information") of the user acquired by the low-accuracy measurement unit using the high-accuracy reference value. At this time, instead of using the body information obtained by high-accuracy measurement as it is as the high-accuracy reference value for obtaining the corrected body information, the high-accuracy reference value is adjusted using the degree of emphasis on the high-accuracy reference value (hereinafter also referred to as "adjustment parameter") and then used. Therefore, correction can be performed using a more appropriate high-accuracy reference value, and high-accuracy body information can be obtained as the corrected body information. Note that the determination of the adjustment parameter may be performed to a necessary extent according to the possibility or degree of difference in body composition between, for example, the time of high-accuracy measurement and the time of measurement of low-accuracy body information (hereinafter also referred to as "low-accuracy reference value") for determining the correction method (hereinafter also referred to as "correction method determination time"), and the adjustment of the high-accuracy reference value may not be performed.

[0010] The degree may be determined according to the contribution degree of the reference value stored in the storage unit to the low-accuracy body information acquired by the low-accuracy measurement unit.

[0011] With this configuration, the degree can be determined in consideration of the contribution degree of the low-accuracy body information to the reference value.

[0012] The degree may be determined based on the difference between the weight when the measurement with the first accuracy is performed and the weight when the algorithm or the low-accuracy body information is corrected.

[0013] With this configuration, the possibility or degree of difference in body composition between the high-accuracy measurement time and the correction method determination time can be judged by the difference in weight.

[0014] The degree may be determined based on the period from when the first precision measurement is performed until the algorithm or the low-precision body information is corrected.

[0015] With this configuration, the possibility or degree of difference in body composition between the time of high-precision measurement and the time of correction method determination can be judged by the period from the time of high-precision measurement until the time of correction method determination.

[0016] The degree may also be determined based on the difference between a reference value and the low-precision body information acquired by the low-precision measurement unit when correcting the algorithm or the low-precision body information.

[0017] With this configuration, the possibility or degree of difference in body composition between the time of high-precision measurement and the time of correction method determination can be judged by the difference between the reference value and the low-precision body information as the low-precision reference value.

[0018] The degree may be determined based on the user's selection.

[0019] With this configuration, the degree can be determined based on the user's selection.

[0020] The storage unit may store a correction function for correcting the corrected algorithm or low-precision body information and the corrected body information.

[0021] With this configuration, since the corrected algorithm or correction function and the corrected body information are stored, they can be referred to later.

[0022] It may further include an input unit that receives the body information obtained by the first-precision measurement and inputs it as a reference value.

[0023] With this configuration, the reference value can be easily input.

[0024] The output unit may change the appearance and display the corrected body information and the low-precision body information obtained by inputting the measurement value into a predetermined algorithm in the low-precision measurement unit so that they can be distinguished.

[0025] With this configuration, the user can know whether the in-body information has been refined to a high precision or not.

[0026] The output unit may display information regarding the accuracy of the corrected in-body information based on the degree.

[0027] With this configuration, the user can know to what extent the measurement result has been refined to a high precision.

[0028] The output unit may display an alert based on the period from when a high-precision measurement is performed until low-precision in-body information is acquired.

[0029] With this configuration, it is possible to prompt the user to perform a new high-precision measurement and motivate the improvement of the in-body measurement system to a high precision.

[0030] To achieve the above object, the present invention is an in-body measurement program that causes a computer to function as the storage unit, low-precision measurement unit, correction unit, output unit, and input unit that configure the above-described in-body measurement system.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

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Figure 8

Embodiments for Carrying Out the Invention

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below show an example of implementing the present invention, and do not limit the present invention to the specific configurations described below. In implementing the present invention, specific configurations according to the embodiments may be appropriately adopted.

[0033] [Configuration of Body Composition Meter] FIG. 1 is a perspective view of a simple BIA body composition meter 100 according to one embodiment of the present invention. The simple BIA body composition meter 100 includes an input unit 102, a low-precision measurement unit 104, and an output unit 106.

[0034] The input unit 102 is a means for inputting information into the simple BIA body composition meter 100. The method of inputting information by the input unit 102 may be a manual method, a method via a recording medium, a method by wired communication, a method by wireless communication, or other methods.

[0035] Manual input methods may include, for example, button type, dial type, and touch sensor type. Methods via a recording medium may include, for example, methods using a flash memory, methods using a CD-ROM, and methods using a DVD-ROM. Methods via wireless communication may include, for example, methods via the Internet, methods via a wireless LAN such as Wi-Fi (registered trademark), and methods via short-range wireless communication such as Bluetooth (registered trademark) and NFC (Near Field Communication). In the present embodiment, the input unit 102 is a manual input method and is of the button type.

[0036] Information related to body composition is input to the input unit 102. Specifically, information that cannot be measured by the simple BIA body composition meter 100, such as age, height, and gender, for example, is input to the input unit 102.

[0037] In addition, to the input unit 102, among the body information such as body fat percentage, body fat mass, muscle mass, abdominal muscle / back muscle ratio, body water content, bone mass, visceral fat area, and basal metabolism, body composition measurement (estimation) methods with higher measurement accuracy of body information compared to the simple BIA body composition meter (for example, DXA, MRI, CT, heavy water dilution method, 4C model) and high-precision body information (high-precision reference values) measured by a high-precision BIA body composition meter (multi-frequency multi-electrode BIA body composition meter, site-specific BIA body composition meter) are input.

[0038] Furthermore, the weight at the time when the high-precision body information is measured, the measurement date and time, etc. are also input to the input unit 102.

[0039] The input information is stored in the storage unit 110 described later.

[0040] The low-precision measurement unit 104 is a measurement means for measuring the user's low-precision body information (low-precision body information) by inputting measurement values into a predetermined algorithm. The measurement values are, for example, weight, impedance, etc. The predetermined algorithm may be, for example, a regression formula for calculating low-precision body information from the measurement values, or may be a machine learning model that outputs low-precision body information with the measurement values as input. In the present embodiment, the low-precision measurement unit 104 includes a weight measurement means for measuring the user's weight, a bioimpedance measurement means for measuring the user's bioimpedance by BIA, a date and time specifying means for specifying the measurement date and time, and an arithmetic means for calculating low-precision body information by inputting at least the bioimpedance as a measurement value into the algorithm.

[0041] Whether the measurement method is low-precision or high-precision is relatively determined. Generally, for the measurement unit of a BIA body composition analyzer, the more types of frequencies of the applied current and the more electrodes, and also the more measurable by each part rather than only measurable for the whole body, the more accurately the body information can be measured. For example, the measurement unit of a multi-frequency multi-electrode BIA body composition analyzer has a higher measurement accuracy of body information than that of a single-frequency 4-electrode BIA body composition analyzer, and the measurement unit of a BIA body composition analyzer by part has a higher measurement accuracy of body information than that of a whole-body type BIA body composition analyzer. In the present embodiment, the low-precision measurement unit 104 is a measurement unit for measuring low-precision body information of a single-frequency 4-electrode type.

[0042] The output unit 106 is an output means for outputting the measurement results of the user. The output unit 106 includes, for example, an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diode), etc. The output unit 106 may be integrated with the simple BIA body composition analyzer 100, or may not be integrated with the simple BIA body composition analyzer 100 like a smartphone or a tablet. In the present embodiment, the output unit 106 is an LCD integrated with the simple BIA body composition analyzer 100.

[0043] The output unit 106 outputs the measurement results of the user. The output may be, for example, a display such as a numerical value, character, or body shape diagram reflecting the measurement results of the user, or may be an output in the form of sound or other formats. In the present embodiment, the output unit 106 displays the weight measured by the low-precision measurement unit 104, the low-precision body information, the corrected body information described later, the information related to the measurement accuracy, and an alert prompting the measurement of the high-precision reference value.

[0044] Figure 2 is a block diagram showing the functional configuration of the simple BIA body composition meter 100 according to an embodiment of the present invention. The simple BIA body composition meter 100 includes a control unit 108, a storage unit 110, and a correction unit 112 in addition to the input unit 102, the low-precision measurement unit 104, and the output unit 106 as shown in Figure 1.

[0045] The control unit 108 is a control device that controls the input unit 102, the low-precision measurement unit 104, the output unit 106, the storage unit 110, and the correction unit 112. The control unit 108 has a CPU (Central Processing Unit). The control unit 108 is electrically connected to each unit. By executing the program stored in the storage unit 110, the control unit 108 realizes the functions of each unit.

[0046] The storage unit 110 is a memory that can store data. The memory may be, for example, a volatile memory (e.g., RAM) or a non-volatile memory (e.g., ROM). The storage unit 110 may be built into the simple BIA body composition meter 100 as shown in Figure 2, or may be provided outside the simple BIA body composition meter 100 such as an external hard disk drive or an external server. In the present embodiment, the storage unit 110 is built into the simple BIA body composition meter 100.

[0047] The storage unit 110 stores the program executed by the control unit 108, the correction function described later, the corrected body information, and the like.

[0048] In addition, the storage unit 110 stores the information input to the input unit 102. Specifically, the storage unit 110 stores information such as age, height, gender, high-precision reference value, weight when high-precision body information is measured, and measurement date and time input to the input unit 102.

[0049] Also, the storage unit 110 stores the information used by the low-precision measurement unit 104. Specifically, as the information used by the low-precision measurement unit 104, the storage unit 110 stores, for example, general weight, age, height, gender of users, statistical information related to body information, and information such as a predetermined algorithm (for example, a regression formula, etc.) for obtaining low-precision body information from measurement values obtained by low-precision measurement.

[0050] Furthermore, the storage unit 110 stores the information acquired by the low-precision measurement unit 104. Specifically, as the information acquired by the low-precision measurement unit 104, the storage unit 110 stores, for example, information such as weight, impedance, low-precision body information, measurement date and time, and corrected body information described later.

[0051] The correction unit 112 is a correction means for correcting an algorithm or low-precision body information based on the high-precision reference value stored in the storage unit 110 and the degree of importance (adjustment parameter) of the reference value. The adjustment parameter is a parameter for adjusting the high-precision reference value, for example, by multiplying or adding to the high-precision reference value. As shown in FIG. 2, the correction unit 112 may be built into the simple BIA body composition meter 100, or may be provided outside the simple BIA body composition meter 100 such as an external server. In the present embodiment, the correction unit 112 is built into the simple BIA body composition meter 100.

[0052] As described above, since the measurement in the low-precision measurement unit 104 is relatively low-precision, even if the same body composition as the body composition at the time of performing high-precision measurement to obtain a high-precision reference value is measured, a difference may occur between the low-precision body information measured by the low-precision measurement unit 104 and the high-precision reference value. Therefore, the correction unit 112 in the present embodiment determines a correction function for correcting the low-precision body information so as to reduce this difference.

[0053] However, in order to consider that the difference from the low-accuracy in-vivo information (low-accuracy reference value) at the time of measuring the low-accuracy in-vivo information for determining the high-accuracy reference value and the correction function, that is, at the time of determining the correction method, is due to the measurement accuracy of the low-accuracy measurement unit 104, it is a prerequisite that the body composition at the time of measuring the high-accuracy reference value and the body composition at the time of determining the correction method are the same or extremely close. This is because when the body compositions at both times (i.e., the true values) are different, the ratio between the element caused by the change in body composition and the element caused by the measurement accuracy of the low-accuracy measurement unit 104 in the difference between the high-accuracy reference value and the low-accuracy reference value becomes unclear.

[0054] Therefore, the correction unit 112 determines the contribution degree of the high-accuracy reference value to the low-accuracy reference value (hereinafter referred to as the "contribution degree of the high-accuracy reference value") used for determining the adjustment parameter according to the possibility or degree of difference between the body composition at the time of obtaining the high-accuracy reference value and the body composition at the time of determining the correction method, and determines the adjustment parameter according to this contribution degree. The contribution degree of the high-accuracy reference value is determined based on the predetermined conditions exemplified below in view of the above circumstances.

[0055] As the predetermined conditions, for example, there is one that uses the absolute value of the difference between the body weight at the time of obtaining the high-accuracy reference value and the body weight at the time of determining the correction method (hereinafter referred to as the "body weight difference") as an index.

[0056] Specifically, when the body weight difference is smaller than α (body weight difference < α), since the body weight deviation is small, it is considered that the change in body composition is small between the time of obtaining the high-accuracy reference value and the time of determining the correction method, and it is determined that the contribution degree of the high-accuracy reference value is large. At this time, the correction unit 112 determines the adjustment parameter Y0 according to the contribution degree of the high-accuracy reference value, and adjusts the high-accuracy reference value by the first-order adjustment "Y0 × high-accuracy reference value" that multiplies Y0 by the high-accuracy reference value. As specific values of Y0, different values are adopted depending on whether the body weight has increased or decreased, and different values are adopted according to the type of in-vivo information used as the high-accuracy reference value (for example, body fat mass, muscle mass, body water content, etc.).

[0057] When the weight at the time of determining the correction method has increased compared to the weight at the time the high-precision reference value was obtained, Y0 used to adjust the body fat (amount / percentage), which is the high-precision reference value, is set to 1 or a value slightly smaller than 1, Y0 used to adjust the muscle mass is set to 1 or a value slightly larger than 1, and Y0 used to adjust the body water content is set to 1 or a value slightly larger than 1. Note that setting Y0 to 1 is synonymous with not performing the primary adjustment.

[0058] On the other hand, when the body weight at the time of determining the correction method has decreased compared to the body weight at the time the high-precision reference value was obtained, Y0 used to adjust the body fat (amount / percentage), which is the high-precision reference value, shall be 1 or a value slightly larger than 1, Y0 used to adjust the muscle mass shall be 1 or a value slightly smaller than 1, and Y0 used to adjust the body water content shall be 1 or a value slightly smaller than 1.

[0059] When the weight difference is equal to or greater than α but smaller than β (weight difference < β), the weight difference is considered to be "weight difference < α". Since a certain degree of weight deviation is observed from time to time, it is considered that there is a change in body composition between the time when the high-precision reference value is obtained and the time when the correction method is determined, and it is determined that the contribution of the high-precision reference value to the low-precision reference value decreases as the weight difference increases. At this time, the correction unit 112 determines adjustment parameters Y1 to Y5 (hereinafter referred to as "Y1 to 5") according to the contribution of the high-precision reference value, and adjusts the high-precision reference value by a primary adjustment "Y1 to 5 x high-precision reference value" in which Y1 to 5 are multiplied by the high-precision reference value. As for the specific values of Y1 to 5, similar to Y0, different values are adopted depending on whether the weight has increased or decreased, and different values are adopted depending on the type of body information (e.g., body fat mass, muscle mass, body water mass, etc.) that is regarded as the high-precision reference value.

[0060] When the body weight at the time of determining the correction method has increased compared to the body weight at the time the high-precision reference value was obtained, Y1 to 5 used to adjust the body fat (amount / percentage), which is the high-precision reference value, are set to values smaller than 1, Y1 to 5 used to adjust the muscle mass are set to values greater than 1, and Y1 to 5 used to adjust the body water content are set to values greater than 1.

[0061] On the other hand, when the weight at the time of determining the correction method has decreased compared to the weight at the time of obtaining the high-precision reference value, Y1 to Y5 used for adjusting the body fat (quantity / ratio), which is the high-precision reference value, shall be values greater than 1, Y1 to Y5 used for adjusting the muscle mass shall be values less than 1, and Y1 to Y5 used for adjusting the body water content shall be values less than 1.

[0062] When the weight difference is β or more (weight difference ≥ β), and the absolute value of the difference between the high-precision reference value and the low-precision body information by the simple BIA body composition meter 1 00 (hereinafter referred to as "body difference") is γ or more (body difference ≥ γ), there is a weight deviation, so although there is a change in body composition between the time of obtaining the high-precision reference value and the time of determining the correction method, in order to reflect the body composition of the user that greatly deviates from the average body composition estimated from the statistical values, it is determined that the contribution degree of the high-precision reference value is slightly low. At this time, the high-precision reference value is adjusted by the same primary adjustment "Y1 to Y5 × high-precision reference value" as "weight difference < β".

[0063] When the conditions related to the above-mentioned weight difference and body difference are not satisfied, it is considered that there is a large change in body composition between the time of obtaining the high-precision reference value and the time of determining the correction method, and it is determined that the contribution degree of the high-precision reference value is small. At this time, the correction unit 112 does not perform correction based on the high-precision reference value adjusted by the adjustment parameter.

[0064] Also, as a predetermined condition, for example, there is one that uses the period from the time of obtaining the high-precision reference value to the time of determining the correction method (hereinafter referred to as "elapsed days") as an index.

[0065] Specifically, when the elapsed days are "within z1 days", since the elapsed days are relatively short, it is considered that the change in body composition between the time of obtaining the high-precision reference value and the time of determining the correction method is small, and it is determined that the contribution degree of the high-precision reference value is large. At this time, the correction unit 112 performs only primary adjustment and does not perform adjustment (secondary adjustment) of the high-precision reference value based on the elapsed days.

[0066] When the number of elapsed days is z1 days but within "z2 days", since the number of elapsed days is somewhat visible, it is considered that there is a change in body composition between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is slightly low. At this time, the correction unit 112 adjusts the high-precision reference value that has been primarily adjusted using the low-precision reference value according to the contribution degree of the high-precision reference value. Specifically, the correction unit 112 adjusts the high-precision reference value by the secondary adjustment "(a × Y0~5 × high-precision reference value + b × low-precision reference value) / 2". Note that the secondary adjustment parameters a and b may satisfy, for example, 0 < a < 1 and b = 1 - a. The correction unit 112 makes the value of a smaller and the value of b larger as the number of elapsed days is longer. The high-precision reference value is adjusted by the secondary adjustment "(a × Y0~5 × high-precision reference value + b × low-precision reference value) / 2".

[0067] Also, as the primary adjustment parameters Y0~5 in the case of performing secondary adjustment (that is, when the number of elapsed days is greater than z1 and within z2), values different from the values of Y0~5 in the case of performing only primary adjustment (that is, when the number of elapsed days is within z1) may be adopted. This is because when the number of elapsed days is "within z1 days", that is, when the number of elapsed days is relatively short, it is considered that the reason for the weight difference is the change in body water content, while when the number of elapsed days exceeds z1 days, that is, when the number of elapsed days is relatively long, it is difficult to identify the reason for the weight difference. Thus, the reason for the weight difference is different between the case of a short number of elapsed days and the case of a long number of elapsed days.

[0068] When the weight at the time of determining the correction method has increased compared to the weight at the time of acquiring the high-precision reference value, all of Y0~5 used for adjusting the body fat (quantity / rate), muscle mass, and body water content, which are the high-precision reference values, shall be values of 1 or more.

[0069] On the other hand, when the weight at the time of determining the correction method has decreased compared to the weight at the time of acquiring the high-precision reference value, all of Y0~5 used for adjusting the body fat (quantity / rate), muscle mass, and body water content, which are the high-precision reference values, are values of 1 or less.

[0070] When the conditions related to the above-mentioned elapsed days are not satisfied, that is, when the elapsed days are z2 or more, it is considered that the change in body composition is large between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is low. At this time, the correction unit 112 does not determine the adjustment parameter and does not adjust the high-precision reference value.

[0071] However, when the first adjustment "Y0 to 5 × high-precision reference value" is performed and the elapsed days have passed z2 days, but the user selects the second adjustment (hereinafter referred to as "adjustment selection"), the adjustment parameter related to the second adjustment is determined, and the high-precision reference value may be adjusted by the second adjustment "(a × Y0 to 5 × high-precision reference value + b × low precision reference value) / 2".

[0072] Note that the weight difference has a greater impact on the change in body composition compared to the elapsed days. Therefore, the adjustment parameters Y0 to 5 of the first adjustment that reflect the contribution degree of the high-precision reference value are parameters that are greatly affected according to the weight difference. On the other hand, the adjustment parameters a and b of the second adjustment that also reflect the contribution degree of the high-precision reference value are parameters that are not affected so much according to the elapsed days. That is, there is a qualitative difference in the degree of influence of the adjustment parameters Y0 to 5 of the first adjustment and the adjustment parameters a and b of the second adjustment on the parameters of the weight difference and the elapsed days.

[0073] Also, since the predetermined condition is a condition for determining the contribution degree of the high-precision reference value, for example, the ratio of the weight at the time of acquisition of the high-precision reference value to the weight at the time of determination of the correction method may be used as an index.

[0074] Also, even if the predetermined condition uses the weight difference as an index, instead of dividing it into three stages of "weight difference < α", "weight difference < β", and "weight difference ≧ β", it may be divided into fewer stages or more stages. Similarly, even if the predetermined condition uses the elapsed days as an index, instead of dividing it into two stages of "within z1 days" and "within z2 days", it may be divided into fewer stages or more stages.

[0075] In addition, for the adjustment of the high-precision reference value, not only the secondary adjustment is performed after the primary adjustment, but also the third or higher-order adjustment such as further weighting may be performed after the secondary adjustment. That is, for the formula for calculating the adjusted high-precision reference value, it may be obtained using several adjustment formulas.

[0076] As described above, when the adjustment parameter is determined and the high-precision reference value is adjusted, the correction unit 112 determines a correction function that relates the in-corrector information and the low-precision in-body information based on the high-precision reference value adjusted using this adjustment parameter and the low-precision reference value. Then, by correcting the low-precision in-body information with this correction function, the in-corrector information is obtained. In the measurement after the correction function is determined, the correction unit 112 obtains the in-corrector information by correcting the low-precision in-body information calculated using a predetermined algorithm by the low-precision measurement unit 104 with this correction function. When a new high-precision reference value is obtained, the correction function can be updated.

[0077] The correction function is, for example, (In-corrector information) = c × (Low-precision in-body information) + d ···(1) (In-corrector information) = c × (Low-precision in-body information) ···(2) (In-corrector information) = (Low-precision in-body information) + d ···(3) It may be any of these. The parameters c and d of the correction function are respectively for formulas (1) to (3), (Adjusted high-precision reference value) = c × (Low-precision reference value) + d ···(1') (Adjusted high-precision reference value) = c × (Low-precision reference value) ···(2') (Adjusted high-precision reference value) = (Low-precision reference value) + d ···(3') Are determined to satisfy.

[0078] [Operation of the Body Composition Analyzer According to the First Embodiment] The following describes the flow for realizing the operation of the body composition monitor according to the first embodiment based on the configuration of the body composition monitor described above. This flow can be performed each time a high-precision reference value is input to the simple BIA body composition monitor 100. In this flow, a correction function is determined using the high-precision reference value and the low-precision reference value. In the measurement after determining the correction function, the low-precision body information can be corrected using this correction function.

[0079] FIG. 3 is a first flowchart showing the operation of the simple BIA body composition monitor 100 for determining the correction function according to the first embodiment of the present invention. The first flow according to the first embodiment is a flow for primarily adjusting high-precision body information using the body weight difference as an index. When the user operates the simple BIA body composition monitor 100 to start the process of determining the correction function, the first flow starts.

[0080] First, the low-precision measurement unit 104 measures the user's body information (step S102).

[0081] When the low-precision measurement unit 104 measures the user's body information, the storage unit 110 stores the low-precision reference value (step S104).

[0082] When the storage unit 110 stores the low-precision reference value, the correction unit 112 determines the presence or absence of the high-precision reference value (step S106) and the body weight difference (step S108) stored in the storage unit 110.

[0083] When it is determined that there is a "high-precision reference value" and "body weight difference < α" stored in the storage unit 110 (step S106: Yes, step S108: Yes), the correction unit 112 determines the adjustment parameter Y0 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the primary adjustment "Y0 × high-precision reference value" (step S110), and the flow ends.

[0084] That is, when it is determined that "weight difference < α", since the weight deviation is small, it is considered that the change in body composition is small between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is large. At this time, the correction unit 112 determines an adjustment parameter Y0 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the first-order adjustment "Y0 × high-precision reference value".

[0085] On the other hand, when it is determined that "weight difference < α" is not satisfied with "high-precision reference value available" stored in the storage unit 110 (step S106: Yes, step S108: No), the correction unit 112 determines the weight difference again (step S112). Then, when it is determined that "weight difference < β" (step S112: Yes), the correction unit 112 determines adjustment parameters Y1 to Y5 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the first-order adjustment "Y1 to Y5 × high-precision reference value" (step S114), and the flow ends.

[0086] That is, when it is determined that "weight difference < β", since a certain degree of weight deviation is observed compared to when it is determined that "weight difference < α", it is considered that there is a change in body composition between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is slightly low. At this time, the correction unit 112 determines adjustment parameters Y1 to Y5 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the first-order adjustment "Y1 to Y5 × high-precision reference value".

[0087] On the other hand, whether it is determined that "high-precision reference value available" is not stored in the storage unit 110 (step S106: No), or it is determined that although "high-precision reference value available" exists, "weight difference < α" is not satisfied and "weight difference < β" is not satisfied either (step S106: Yes, step S108: No, step S112: No), the correction unit 112 does not correct the low-precision reference value by the correction function based on the first-order adjusted high-precision reference value (step S116), and the storage unit 110 only stores the high-precision reference value as a reference value, and the flow ends.

[0088] That is, when it is determined that although there is a "high-precision reference value", the weight difference is not "<α" but not "<β" either, it is considered that the change in body composition is large between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is small. At this time, the correction unit 112 does not perform correction.

[0089] As described above, in the first flow according to the first embodiment, the contribution degree of the high-precision reference value is evaluated using the weight difference as an index. When the weight deviation is small (weight difference <α), the high-precision reference value is adjusted by the first-order adjustment "Y0 × high-precision reference value". When a certain degree of weight deviation is observed (weight difference <β), the high-precision reference value is adjusted by the first-order adjustment "Y1 to 5 × high-precision reference value". When the weight deviation is large (weight difference ≥β), no correction is performed.

[0090] In this way, in the first flow according to the first embodiment, even if there is a certain degree of change in body composition between the acquisition of the high-precision reference value and the determination of the correction method, an adjustment parameter reflecting the contribution degree of the high-precision reference value is determined, and the high-precision reference value is adjusted by this adjustment parameter. In particular, in this embodiment, the contribution degree can be evaluated based on the weight difference regardless of the difference in the measurement method, and an adjustment parameter that reflects the contribution degree in detail can be determined.

[0091] In other words, when a difference occurs between the high-precision reference value and the low-precision reference value, even if the low-precision in-body information is corrected, it is necessary to determine whether such a difference is due to the measurement accuracy of the simple BIA body composition meter 100 or due to the change in the user's body composition.

[0092] Therefore, using the weight difference as an index, when the weight difference is small and the identity of the user's body composition can be guaranteed, it is determined that the difference between the high-precision reference value and the low-precision reference value is due to the measurement accuracy of the simple BIA body composition meter 100, and an adjustment parameter is determined so that the contribution degree of the high-precision reference value becomes large.

[0093] On the other hand, when the weight difference is large and the identity of the user's body composition cannot be guaranteed, it is determined that the difference between the high-precision reference value and the low-precision reference value is due to the change in the user's body composition, and the adjustment parameter is determined so that the contribution degree of the high-precision reference value becomes small. Therefore, a high-precision in-body measurement system and program tailored to the individual can be provided.

[0094] FIG. 4 is a second flowchart showing the operation of the simple BIA body composition meter 100 for determining the correction function according to the first embodiment of the present invention. The second flow is a flow for further secondarily adjusting the firstarily adjusted high-precision reference value using the number of elapsed days as an index. When the first flow ends, the second flow starts.

[0095] When the second flow starts, the correction unit 112 determines the presence or absence of the first adjustment (step S202) and the number of elapsed days (step S204).

[0096] When it is determined that there is a first adjustment and the number of elapsed days is within "z1 days" (step S202: Yes, step S204: Yes), the correction unit 112 does not perform the secondary adjustment (step S206), and the correction unit 112 determines a correction function based on the firstarily adjusted high-precision reference value, corrects the low-precision reference value with this correction function, and the output unit 106 displays the low-precision in-body information as the corrected low-precision reference value as corrected in-body information (step S208). Then, the storage unit 110 stores the correction function and the corrected in-body information (step S210), and the flow ends.

[0097] That is, when the first adjustment is performed and the number of elapsed days is within "z1 days", it is considered that the change in the body composition is small between the acquisition time of the high-precision reference value and the determination time of the correction method, and it is determined that the contribution degree of the high-precision reference value is high. At this time, the correction unit 112 does not perform the secondary adjustment.

[0098] On the other hand, when it is determined that there is a first adjustment and the number of elapsed days is not within "z1 days" (step S202: Yes, step S204: No), the correction unit 112 determines the number of elapsed days again (step S212).

[0099] When the number of elapsed days is determined to be "within z2 days" (step S212: Yes), the correction unit 112 determines adjustment parameters Y0 to 5, a, and b according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the secondary adjustment "(a × Y0 to 5 × high-precision reference value + b × low-precision reference value) / 2". Then, the correction unit 112 determines a correction function based on the secondarily adjusted high-precision reference value, corrects the low-precision reference value with this correction function, the output unit 106 displays the low-precision body information as the corrected low-precision reference value as corrected body information (step S216), the storage unit 110 stores the correction function and the corrected body information (step S210), and the flow ends.

[0100] That is, when it is determined that the number of elapsed days is "within z2 days" with "primary adjustment", it is considered that there is a change in body composition between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is relatively low. At this time, the correction unit 112 determines adjustment parameters Y0 to 5, a, and b according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the secondary adjustment "(a × Y0 to 5 × high-precision reference value + b × low-precision reference value) / 2".

[0101] On the other hand, if it is determined that there is no "primary adjustment" (step S202: No), or if it is determined that the number of elapsed days is not "within z2 days" with "primary adjustment" (step S202: Yes, step S204: No, step S212: No), the correction unit 112 corrects the low-precision reference value without using the correction function, the output unit 106 displays the low-precision body information as the low-precision reference value (step S218), the storage unit 110 stores the low-precision body information as the low-precision reference value (step S220), and the flow ends.

[0102] That is, when it is not determined that there is "primary adjustment", or when it is determined that the number of elapsed days is not "within z2 days" even with "primary adjustment", it is considered that the change in body composition is large between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is small. At this time, the correction unit 112 does not perform correction.

[0103] As described above, in the second flow according to the first embodiment, the contribution degree of the high-precision reference value is evaluated using the number of elapsed days as an index. When the first adjustment is performed and the number of days has hardly elapsed (within z1 days), the low-precision body information as the low-precision reference value is corrected by the correction function based on the first-adjusted high-precision reference value, and the corrected low-precision body information as the corrected low-precision reference value is displayed as the corrected body information, and the correction function and the corrected body information are stored.

[0104] Also, when the number of days has elapsed to a certain extent (within z2 days), the low-precision body information as the low-precision reference value is corrected by the correction function based on the second-adjusted high-precision reference value, and the corrected low-precision body information as the corrected low-precision reference value is displayed as the corrected body information, and the correction function and the corrected body information are stored.

[0105] Also, when the first adjustment is not performed, or when the number of days has elapsed beyond z2 days even if the first adjustment is performed, the low-precision body information as the low-precision reference value is displayed without correction by the correction function, and the low-precision body information as the low-precision reference value is stored.

[0106] In this way, in the second flow, even if there is a certain change in body composition between the acquisition of the high-precision reference value and the determination of the correction method, an adjustment parameter reflecting the contribution degree of the high-precision reference value is determined, and by adjusting the high-precision reference value with this adjustment parameter, a correction function can be determined using the high-precision reference value and the low-precision reference value. In particular, in the present embodiment, the contribution degree of the high-precision reference value is evaluated based on the passage of time, and an adjustment parameter that reflects the contribution degree of the high-precision reference value in detail can be determined.

[0107] In other words, when a difference occurs between the high-precision reference value and the low-precision body information as the low-precision reference value at the time of determining the correction method, even if the low-precision body information as the low-precision reference value is corrected, it is necessary to determine whether such a difference is due to the measurement accuracy of the simple BIA body composition meter 100 or due to a change in the user's body composition.

[0108] Therefore, using the passage of time as an indicator, when time has not passed and the identity of the user's body composition can be guaranteed, it is determined that the difference between the high-precision reference value and the low-precision body information as the low-precision reference value at the time of determining the correction method is due to the measurement accuracy of the simple BIA body composition meter 100, and the adjustment parameter is determined so that the contribution degree of the high-precision reference value becomes large.

[0109] On the other hand, when time has passed and the identity of the user's body composition cannot be guaranteed, it is determined that the difference between the high-precision reference value and the low-precision body information as the low-precision reference value at the time of determining the correction method is due to the change in the user's body composition, and the adjustment parameter is determined so that the contribution degree of the high-precision reference value becomes small. Therefore, a high-precision in-body measurement system and program tailored to an individual can be provided.

[0110] Also, in the second flow, since the correction function and the corrected body information can be stored, by reflecting the correction function and the corrected body information in future in-body measurements, the more the simple BIA body composition meter 100 is used, the more accurately it can reflect individual differences, and a high-precision in-body measurement system and program tailored to an individual can be provided.

[0111] Moreover, instead of evaluating only with a predetermined algorithm (for example, a regression formula, etc.), it is evaluated with an individual-corresponding correction function according to the high-precision reference value of the individual, so that it is possible to match the high-precision body composition measurement result corresponding to individual differences while being a simple measurement. Furthermore, since the relative change can be tracked by the simple BIA body composition meter 100 from that value, unlike the body composition measurement (estimation) method that is usually difficult to measure and the measurement of the high-precision BIA body composition meter, it can be captured in a timely manner when you want to know without missing the daily detailed changes, and since it can have the advantages of both, a high-precision in-body measurement system and program tailored to an individual can be provided.

[0112] In addition, by subordinating the second flow that reflects the low-accuracy in-vivo information as the low-accuracy reference value via the adjustment parameters a and b to the first flow that reflects only the high-accuracy reference value via the adjustment parameters Y0 to 5, it is possible to prevent excessive correction by the first flow, and thus it is possible to provide a highly accurate in-vivo measurement system and program tailored to an individual.

[0113] FIG. 5(a) is a diagram showing a first result display screen of the simple BIA body composition meter 100 according to the first embodiment of the present invention, and FIG. 5(b) is a diagram showing a second result display screen of the simple BIA body composition meter 100 according to the first embodiment of the present invention.

[0114] As shown in FIG. 5(a), the output unit 106 displays the corrected in-vivo information 200A. For example, the output unit 106 displays the corrected in-vivo information 200A as body fat percentage: 17%, body fat mass: 10 kg, muscle mass: 55 kg, rectus abdominis / erector spinae ratio: 1:2, body water content: 48 kg, bone mass: 3.4 kg, visceral fat area: 77 cm2, basal metabolism: 1200 kcal. Thereby, the user can know the corrected in-vivo information.

[0115] Also, as shown in FIG. 5(b), the output unit 106 displays the corrected in-vivo information 200B and the low-accuracy in-vivo information with different appearances so that they can be distinguished. Displaying with different appearances means displaying with marks such as ☆, changing the font, size, and color of the font, and displaying the fact that the body composition measurement (estimation) method and the high-accuracy BIA body composition meter are referred to.

[0116] In the present embodiment, the output unit 106 displays ☆ body fat percentage: 17% (referenced by DXA!), ☆ body fat mass: 10 kg (referenced by DXA!), ☆ muscle mass: 55 kg (referenced by DXA!), ☆ rectus abdominis / erector spinae ratio: 1:2 (referenced by MRI!), ☆ body water content: 48 kg (referenced by heavy water dilution method!), ☆ bone mass: 3.4 kg (referenced by DXA!), ☆ visceral fat area: 77 cm2 (referenced by CT!), basal metabolism: 1200 kcal (BIA regression formula).

[0117] That is, for the corrected body information 200B excluding "Basal metabolism: 1200 kcal (BIA regression formula)", a ☆ mark is added and it is displayed in association with the body composition measurement (estimation) method and the measurement method of the high-precision BIA body composition meter. For "Basal metabolism: 1200 kcal (BIA regression formula)", by not displaying them, the appearance is changed to be able to distinguish the corrected body information 200B from the low-precision body information.

[0118] Also, as shown in FIG. 5(b), the output unit 106 displays information 202B related to the accuracy of the corrected body information based on the degree. The output unit 106 displays information 202B related to the accuracy of the corrected body information, for example, based on the contribution degree of the high-precision reference value.

[0119] The information 202B related to the accuracy of the corrected body information is displayed as "A" when there is a high-precision reference value, for example, and as "B" when there is no high-precision reference value and only the body information measured with low precision by the simple BIA body composition meter 100. Further, even when it is displayed as "A", it is ranked and displayed as A1, A2, A3, etc. in order according to the contribution degree of the high-precision reference value using the accuracy of the high-precision reference value, the weight difference, and the number of elapsed days as indexes.

[0120] In this embodiment, when there is a high-precision reference value, the accuracy of the high-precision reference value is high, it is determined that "weight difference < α", and the number of elapsed days is determined to be "within z1 days", the information 202B related to the accuracy of the corrected body information is displayed ranked as A1.

[0121] In this way, by changing the appearance so that the output unit 106 can distinguish the corrected body information 200B from the low-precision body information, the user can know whether the body information has been made highly accurate. Also, by the output unit 106 displaying information related to the measurement accuracy based on the contribution degree of the high-precision reference value, the user can know to what extent the measurement result has been made highly accurate.

[0122] In other words, the output unit 106 can display how much the measurement result has been refined by the input of the high-precision reference value, and can also simply express the contribution degree of the high-precision reference value according to the method of reference measurement and the number of elapsed days, so that the user can feel the improvement in accuracy. Therefore, a high-precision in-vivo measurement system and program tailored to an individual can be provided.

[0123] [Operation of Body Composition Meter According to Second Embodiment] The configuration of the body composition meter according to the second embodiment is the same as the configuration of the body composition meter described above, and thus the description thereof is omitted. The operation of the body composition meter according to the second embodiment differs from the first flow of the first embodiment described above only in the first flow. Therefore, only this difference will be described below.

[0124] FIG. 6 is a first flowchart showing the operation of the simple BIA body composition meter 100 for determining the correction function according to the second embodiment of the present invention. In the first flow according to the second embodiment, unlike the first flow according to the first embodiment, it is a flow for primarily adjusting high-precision in-vivo information using the in-vivo difference as an index in addition to the body weight difference. When the user operates the simple BIA body composition meter 100 to start the process of determining the correction function, the first flow according to the second embodiment starts.

[0125] First, the low-precision measurement unit 104 measures the user's in-vivo information (step S302).

[0126] When the low-precision measurement unit 104 measures the user's in-vivo information, the storage unit 110 stores the low-precision reference value (step S304).

[0127] When the storage unit 110 stores the low-precision reference value, the correction unit 112 determines the presence or absence of the high-precision reference value (step S306) and the body weight difference (step S308) stored in the storage unit 110.

[0128] When it is determined that "there is a high-precision reference value" and "weight difference < α" stored in the memory unit 110 (step S306: Yes, step S308: Yes), the correction unit 112 determines the adjustment parameter Y0 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the primary adjustment "Y0 × high-precision reference value" (step S310), and the flow ends.

[0129] That is, when it is determined that "weight difference < α", since the weight deviation is small, it is considered that the change in body composition is small between the acquisition time of the high-precision reference value and the determination time of the correction method, and it is determined that the contribution degree of the high-precision reference value is large. At this time, the correction unit 112 determines the adjustment parameter Y0 according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the primary adjustment "Y0 × high-precision reference value".

[0130] On the other hand, when it is determined that "there is a high-precision reference value" and "weight difference < α" is not satisfied in the memory unit 110 (step S306: Yes, step S308: No), the correction unit 112 determines the weight difference again (step S312). Then, it is determined whether "weight difference < β" (step S312: Yes), or even if "weight difference < β" is not satisfied, it is determined that "internal difference ≧ γ" (step S312: No, step S316: Yes), the correction unit 112 determines the adjustment parameters Y1 to 5 according to the high-precision reference value, and adjusts the high-precision reference value by the primary adjustment "Y1 to 5 × high-precision reference value" (step S314), and the flow ends.

[0131] That is, when it is determined that "internal difference ≧ γ" even if "weight difference < β" is not satisfied, since a weight deviation is seen Although there is a change in body composition between the acquisition time of the high-precision reference value and the determination time of the correction method, in order to reflect the body composition of the user that is greatly deviated from the body composition estimated from the statistical value, it is determined that the contribution degree of the high-precision reference value is slightly low. At this time, the high-precision reference value is adjusted by the same primary adjustment "Y1 to 5 × high-precision reference value" as when "weight difference < β".

[0132] On the other hand, if it is determined that the stored value in the memory unit 110 is not "with high-precision reference value" (step S306: No), or if it is determined that although it is "with high-precision reference value", it is not "<weight difference <α>", not "<weight difference <β>", and not "<body difference ≥ γ>" (step S306: Ye s, step S308: No, step S312: No, step S316: No), the correction unit 112 does not correct the low-precision reference value with a correction function based on the first-order adjusted high-precision reference value (step S318), and the memory unit 110 only stores the high-precision reference value as a reference value, and the flow ends.

[0133] That is, when it is determined that although it is "with high-precision reference value", it is not "<weight difference <α>", not "<weight difference <β>", and not "<body difference ≥ γ>", there is a large change in body composition between the time of obtaining the high-precision reference value and the time of determining the correction method, and it is not necessary to reflect the body composition of the user that greatly deviates from the body composition estimated from the statistical value. At this time, the correction unit 112 does not perform correction.

[0134] As described above, in the first flow according to the second embodiment, the contribution degree of the high-precision reference value is evaluated using the weight difference and the body difference as indicators. Different from the first flow according to the first embodiment, even when the weight deviation is large (weight difference ≥ β), when the body difference is large (body difference ≥ γ), the first order adjustment "Y1~5× high-precision reference value" is used to adjust the high-precision reference value, and when the body difference is small, no correction is performed.

[0135] In this way, in the first flow according to the second embodiment, different from the first flow according to the first embodiment, in addition to the weight difference that does not depend on the measurement method, an adjustment parameter reflecting the contribution degree of the high-precision reference value can be determined based on the difference in the body information of the individual (body difference). Therefore, a highly accurate in-body measurement system and program tailored to the individual can be provided.

[0136] [Operation of the Body Composition Meter According to the Third Embodiment] Since the configuration of the body composition meter according to the third embodiment is the same as the configuration of the body composition meter described above, the description thereof will be omitted. Since the operation of the body composition meter according to the third embodiment differs only from the second flow of the first embodiment described above in the second flow, only this difference will be described below.

[0137] FIG. 7 is a second flowchart showing the operation of the simple BIA body composition meter 100 for determining the correction function according to the third embodiment of the present invention. In the second flow according to the third embodiment, unlike the second flow according to the first embodiment, it is a flow of further secondarily adjusting the highly accurate reference value that has been primarily adjusted using the user's adjustment selection in addition to the number of elapsed days as an index. When the first flow ends, the second flow according to the third embodiment starts.

[0138] When the second flow starts, the correction unit 112 determines the presence or absence of primary adjustment (step S402) and the number of elapsed days (step S404).

[0139] When it is determined that there is "primary adjustment" and the number of elapsed days is "within z1 days" (step S402: Yes, step S404: Yes), the correction unit 112 does not perform secondary adjustment (step S406), and the correction unit 112 determines a correction function based on the highly accurate reference value that has been primarily adjusted. The low-accuracy reference value is corrected by this correction function, and the output unit 106 displays the low-accuracy body information as the corrected low-accuracy reference value as corrected body information (step S408). Then, the correction unit 112 stores the correction function and the corrected body information (step S410), and the flow ends.

[0140] That is, when primary adjustment is performed and the number of elapsed days is "within z1 days", it is considered that the change in body composition is small between the acquisition of the highly accurate reference value and the determination of the correction method, and it is determined that the contribution degree of the highly accurate reference value is high. At this time, the correction unit 112 does not perform secondary adjustment.

[0141] On the other hand, if it is determined that the number of elapsed days is not "within z1 days" with "primary adjustment" (step S402: Yes, step S404: No), the correction unit 112 determines the number of elapsed days again (step S412).

[0142] Is it determined that the number of elapsed days is "within z2 days" (step S412: Yes)? Or, even though it is determined that the number of elapsed days is not "within z2 days" and an "alert is presented" to prompt the user to measure the high-precision reference value (step S418), if it is determined that the user has made an "adjustment selection" (step S420: Yes), the correction unit 112 determines adjustment parameters Y0 to 5, a, and b according to the contribution degree, and for the secondary adjustment "(a × Y0 to 5 × high-precision reference value + b × low-precision reference value) / 2", the high-precision reference value is adjusted to be more accurate (step S414). Then, the correction unit 112 corrects the low-precision reference value with a correction function based on the secondarily adjusted high-precision reference value, and the output unit 106 displays the low-precision body information as the corrected low-precision reference value as corrected body information (step S416), the storage unit 110 stores the correction function and the corrected body information (step S410), and the flow ends.

[0143] That is, if it is determined that, although there is "primary adjustment" and the number of elapsed days is not "within z2 days", the user who has been "presented with an alert" has made an "adjustment selection", the correction unit 112 determines adjustment parameters Y0 to 5, a, and b according to the contribution degree of the high-precision reference value, and adjusts the high-precision reference value by the secondary adjustment "(a × Y0 to 5 × high-precision reference value + b × low-precision reference value) / 2".

[0144] On the other hand, if it is determined that there is no "primary adjustment" (step S402: No), and the number of elapsed days with "primary adjustment" is neither "within z1 days" nor "within z2 days", and an "alert is presented" to prompt the user to measure the high-precision reference value, but it is determined that the user did not make an "adjustment selection" (step S402: Yes, step S404: No, step S412: No, step S418, step S420: No), the correction unit 112 does not correct the low-precision reference value using the correction function, the output unit 106 displays the low-precision body information as the low-precision reference value (step S422), the storage unit 110 stores the low-precision body information as the low-precision reference value (step S424), and the flow ends.

[0145] That is, when the number of elapsed days with "primary adjustment" is neither "within z1 days" nor "within z2 days" and the user did not make an "adjustment selection", it is considered that the change in body composition is large between the acquisition of the high-precision reference value and the determination of the correction method, and it is determined that the contribution degree of the high-precision reference value is small. At this time, the correction unit 112 does not perform correction.

[0146] As described above, in the second flow according to the third embodiment, the contribution degree of the high-precision reference value is evaluated using the number of elapsed days and the user's adjustment selection as indicators. Different from the second flow according to the first embodiment, when it is determined that the user who has been "presented with an alert" but has passed z2 days has made an "adjustment selection", the low-precision reference value is corrected using the correction function based on the secondarily adjusted high-precision reference value, and the low-precision body information as the corrected low-precision reference value is displayed as the corrected body information, and the correction function and the corrected body information are stored. On the other hand, when it is determined that the user who has been "presented with an alert" did not make an "adjustment selection", the low-precision body information as the low-precision reference value is displayed without correcting it using the correction function, and the low-precision body information as the low-precision reference value is stored.

[0147] Thus, in the second flow according to the third embodiment, unlike the second flow according to the first embodiment, since the secondary adjustment can be determined based on the number of elapsed days in addition to the user's selection, it is possible to provide a highly accurate in-body measurement system and program tailored to an individual.

[0148] Also, in the second flow according to the third embodiment, unlike the second flow according to the first embodiment, since an alert prompts the user to measure a new highly accurate reference value and can motivate the improvement of the accuracy of the in-body measurement system, it is possible to provide a highly accurate in-body measurement system and program tailored to an individual.

[0149] Note that in the second flow according to the third embodiment, as the timing for "presenting an alert", whether it is "within z2 days" from the acquisition of the highly accurate reference value is used as an index. This number of elapsed days "within z2 days" can be changed depending on the measurement method of the highly accurate reference value. For example, when measuring a highly accurate reference value by a body composition measurement (estimation) method with high measurement accuracy of in-body information such as DXA, since it is not a measurement method that can be measured frequently, z2 may be set to a relatively long number of days. On the other hand, when measuring a highly accurate reference value by a highly accurate BIA body composition meter such as a multi-frequency multi-electrode BIA body composition meter, since it is a measurement method that can be measured more frequently compared to when measuring a highly accurate reference value by DXA or the like, z2 may be set to a relatively short number of days.

[0150] As described above, in any of the first embodiment, the second embodiment, and the third embodiment of the present invention, although it is a simple measurement by the simple BIA body composition meter 100, the user can know highly accurate in-body information. Here, the form of the simple BIA body composition meter 100 may be any form such as a flat type, a stand type, or a card type having an input unit 102, a low-accuracy measurement unit 104, and an output unit 106 as shown in FIG. 8. The simple measurement may be any measurement as long as the measurement accuracy of in-body information is lower than that of body composition measurement (estimation) methods such as simple two-foot measurement and simple two-hand measurement.

[0151] [Modification Example 1] The flow of the above-described embodiment is composed of a first flow and a second flow. However, it may be only the first flow without the second flow. In this case, the adjustment parameter can be determined based only on the body weight difference between the acquisition of the high-precision reference value and the determination of the correction method, the high-precision reference value can be adjusted, and the correction function can be determined.

[0152] Referring to FIG. 3, in the first flow, the correction unit 112 determines a correction function based on the first-order adjusted high-precision reference value and the low-precision body information, and corrects the low-precision body information with this correction function. Then, the corrected low-precision body information is displayed as corrected body information, and the correction function and the corrected body information are stored. This step can be provided as a step following each of step S110 and step S114.

[0153] Note that the low-precision body information as the corrected low-precision reference value may be the average value of the first-order adjusted high-precision reference value and the low-precision body information as the low-precision reference value corrected by the correction function.

[0154] [Modification Example 2] The flow of the above-described embodiment is composed of a first flow and a second flow. However, it may be only the second flow without the first flow. In this case, the adjustment parameter can be determined based only on the number of days elapsed between the acquisition of the high-precision reference value and the determination of the correction method, the high-precision reference value can be adjusted, and the correction function can be determined.

[0155] Referring to FIG. 4, when the user operates the simple BIA body composition meter 100 to start the process of determining the correction function, the second flow starts. When the second flow starts, first, steps of measuring the user's body information by the low-precision measurement unit 104 and storing the low-precision body information by the storage unit 110 are performed. Then, instead of the step in which the correction unit 112 determines the presence or absence of the first-order adjustment (step S202), the correction unit 112 determines the presence or absence of the high-precision reference value stored in the storage unit 110. Thereafter, the steps from step S204 to the end can be determined.

[0156] [Modification Example 3] Also, in the above-described embodiment, the correction unit 112 obtains the corrected body information by correcting the low-accuracy body information obtained by the low-accuracy measurement unit 104 with a correction function based on the high-accuracy reference value and the low-accuracy reference value. However, the method of obtaining the corrected body information is not limited to this.

[0157] The correction unit 112 may correct the algorithm used in the low-accuracy measurement unit 104 based on the high-accuracy reference value and the low-accuracy reference value. The low-accuracy measurement unit 104 inputs the measurement value into the algorithm corrected by the correction unit 112 to obtain the corrected body information.

[0158] For example, when the predetermined algorithm is a regression formula, the correction unit 112 corrects the predetermined regression formula that outputs the low-accuracy body information when the measurement value is input to the regression formula that outputs the adjusted high-accuracy reference value when the measurement value at the time of determining the correction method is input. The storage unit 110 stores the corrected regression formula, and in subsequent low-accuracy measurements, the low-accuracy measurement unit 104 inputs the measurement value into the corrected regression formula to obtain the corrected body information. When a new high-accuracy reference value is obtained, the regression formula can be updated.

[0159] Thus, the correction unit 112 may correct the low-accuracy body information calculated by a predetermined algorithm in the low-accuracy measurement unit 104 with a correction function as in the above-described embodiment, or may correct the algorithm itself for calculating the low-accuracy body information from the measurement value in the low-accuracy measurement unit 104 as in the above-described modification example.

[0160] Also, after obtaining the corrected body information once, the correction unit 112 may correct the predetermined algorithm itself based on the corrected body information and the low-accuracy body information calculated by the predetermined algorithm. Once the algorithm is corrected, the results of subsequent low-accuracy measurements approach the corrected body information. Therefore, once the algorithm is corrected, the difference between the corrected body information and the results of the low-accuracy measurements becomes smaller, and a highly accurate in-body measurement system and program tailored to an individual can be provided.

[0161] [Modification Example 4] Also, in the above-described embodiment, the correction function is set by a single measurement by the low-accuracy measurement unit 104, but the correction function may be set after multiple measurements. For example, the low-accuracy measurement unit 104 may perform measurements on the first day and the second day twice, and the correction function may be set using the average of the low-accuracy body information as the low-accuracy reference values on the first day and the second day. At this time, the correction function may be set during the measurement by the low-accuracy measurement unit 104 on the second day. In this way, by setting the correction function after multiple measurements by the low-accuracy measurement unit 104, the correction function can be set using the low-accuracy body information that takes into account variations. Therefore, it is possible to provide a highly accurate in-body measurement system and program tailored to an individual.

Explanation of Reference Numerals

[0162] 100 ··· Simple BIA Body Composition Meter 102 ··· Input Unit 104 ··· Low-Accuracy Measurement Unit 106 ··· Output Unit 108 ··· Control Unit 110 ··· Storage Unit 112 ··· Correction Unit 200A, 200B ··· Corrected Body Information 202B ··· Information Related to the Accuracy of Corrected Body Information

Claims

1. A storage unit that stores, as a reference value, the in-body information obtained by measurement with the first accuracy; A low-accuracy measurement unit that obtains low-accuracy in-body information by inputting a measurement value obtained by measurement with a second accuracy lower than the first accuracy into a predetermined algorithm; A correction unit that corrects the algorithm or the low-accuracy in-body information based on the reference value stored in the storage unit and the degree of emphasis on the reference value; An output unit that outputs, as corrected in-body information, the low-accuracy in-body information obtained by the low-accuracy measurement unit using the algorithm corrected by the correction unit, or the low-accuracy in-body information obtained by the low-accuracy measurement unit and corrected by the correction unit; An in-body measurement system comprising the above.

2. The in-body measurement system according to Claim 1, wherein the degree is determined according to the contribution degree of the reference value stored in the storage unit to the low-accuracy in-body information obtained by the low-accuracy measurement unit.

3. The in-body measurement system according to Claim 1 or 2, wherein the degree is determined based on the difference between the weight when the measurement with the first accuracy is performed and the weight when the algorithm or the low-accuracy in-body information is corrected.

4. The in-body measurement system according to any one of Claims 1 to 3, wherein the degree is determined based on the period from when the measurement with the first accuracy is performed to when the algorithm or the low-accuracy in-body information is corrected.

5. The in-body measurement system according to Claim 3 or 4, wherein the degree is also determined based on the difference between the reference value and the low-accuracy in-body information obtained by the low-accuracy measurement unit when correcting the algorithm or the low-accuracy in-body information.

6. The in-body measurement system according to any one of Claims 1 to 5, wherein the degree is determined based on a user's selection.

7. The in-body measurement system according to any one of Claims 1 to 6, wherein the storage unit stores a correction function for correcting the corrected algorithm or the low-accuracy in-body information and the corrected in-body information.

8. The in-body measurement system according to any one of Claims 1 to 7, further comprising an input unit that inputs, as the reference value, the in-body information obtained by the measurement with the first accuracy by receiving the same.

9. The body measurement system according to any one of claims 1 to 8, wherein the output unit changes the appearance for display so as to be able to distinguish between the corrected internal information and the low-accuracy internal information obtained by inputting the measurement value into the predetermined algorithm in the low-accuracy measurement unit.

10. The body measurement system according to any one of claims 1 to 9, wherein the output unit displays information related to the accuracy of the corrected internal information based on the degree.

11. The body measurement system according to any one of claims 1 to 10, wherein the output unit displays an alert based on a period from when the high-accuracy measurement is performed until the low-accuracy internal information is obtained.

12. A body measurement program for causing a computer to function as the storage unit, the low-accuracy measurement unit, the correction unit, the output unit, and the input unit that constitute the body measurement system according to any one of claims 1 to 11.

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