Dementia risk determination system and program for dementia risk determination

Abstract

To provide a system and a program for determining the risk of dementia more precisely.SOLUTION: The present invention includes: determination information acquisition means 41 for acquiring age information of a person who is to be determined as a person who will suffer dementia or not, information as to whether the person is living alone, steps information, regular-exercise information, body weight loss information, fall experience information, memory issue information, and depression tendency information; determination means 42 for determining the risk of dementia of the determination target person by using the age information, the information as to whether the person is living alone, the steps information, the regular-exercise information, the body weight loss information, the fall experience information, the memory issue information, and the depression tendency information acquired by the determination information acquisition means 41; and determination result display means 43 for displaying the danger of dementia of the person determined by the determination means 42.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a dementia risk determination system and a program for determining the risk of dementia.

Background Art

[0002] Various dementia determination systems that utilize dementia determination indices such as age, years of education, walking speed, blood test information, cognitive dysfunction information, and activities of daily living dysfunction information have been proposed.

[0003] For example, Patent Document 1 discloses using age, years of education, maximum walking speed, and the score of the TMTA test, Patent Document 2 discloses using age and blood test information, and Patent Document 3 discloses using cognitive dysfunction information and activities of daily living dysfunction information.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since the above-described determination systems use only a very small number of determination indices out of a wide variety of dementia determination indices, the determination accuracy of dementia is insufficient, and a dementia risk determination system with higher accuracy is required.

[0006] The main object of the present disclosure is to provide a dementia risk determination system and a program for determining the risk of dementia with higher accuracy.

Means for Solving the Problems

[0007] According to the present disclosure, a determination information acquisition means for acquiring age information, living alone or not information, number of steps information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information of a person to be determined for the risk of dementia; a determination means for determining the risk of dementia of the person to be determined using the age information, living alone or not information, number of steps information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information acquired by the determination information acquisition means; a determination result display means for displaying the risk of dementia of the person to be determined determined by the determination means, and a dementia risk determination device is provided.

[0008] Further, according to the present disclosure, a computer, a determination information acquisition means for acquiring age information, living alone or not information, number of steps information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information of a person to be determined for the risk of dementia; a determination means for determining the risk of dementia of the person to be determined using the age information, living alone or not information, number of steps information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information acquired by the determination information acquisition means; a determination result display means for displaying the risk of dementia of the person to be determined determined by the determination means; and a program for determining the risk of dementia that causes it to function is provided.

Effects of the Invention

[0009] According to the present disclosure, a more accurate dementia risk determination system and a program for determining the risk of dementia are provided.

Brief Description of the Drawings

[0010]

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DETAILED DESCRIPTION OF THE INVENTION

[0011] Factors related to dementia cover a wide range, including age, diabetes, hypertension, dyslipidemia, obesity, depression, diet, medication, smoking, exercise habits, educational level, intellectual activities, social participation, etc. It is difficult to determine the risk of dementia with a single or very small number of determination indicators.

[0012] In order to determine the risk of dementia with high accuracy, it is preferable to combine many determination indicators to determine the risk of dementia. However, increasing the number of determination indicators with little relevance not only does not improve the accuracy of the dementia risk determination system, but also makes the system difficult to use in practice due to the increase in the number of determination indicators used.

[0013] To avoid this problem, it is preferable to select the determination indicators input into the algorithm used in the dementia risk determination system and construct a model for determining the risk of dementia using as few determination indicators as possible.

[0014] The dementia risk determination system of the present disclosure is a system that uses an algorithm to select factors strongly related to the onset of dementia from a cohort study database and determines the risk of dementia with high accuracy using as few determination indicators as possible. It is a system that can simply and highly accurately determine the risk of dementia.

[0015] Hereinafter, preferred embodiments of the present disclosure will be described with reference to the drawings.

[0016] Referring to FIG. 1, the dementia risk determination system 1 of the present disclosure includes a CPU 11, a RAM 12, a storage device 13, an input and display device 14, and an acceleration sensor 15. The RAM 12, the storage device 13, the input and display device 14, and the acceleration sensor 15 are configured to be able to exchange data with the CPU 11 via an internal bus 16. The CPU 11, the RAM 12, the storage device 13, the input and display device 14, and the acceleration sensor 15 are provided in a single housing. The dementia risk determination system 1 is configured as, for example, a smartphone. Note that, as the acceleration sensor 15, an acceleration sensor (not shown) incorporated in a wearable device (not shown) such as a wearable watch (smartwatch) can also be used.

[0017] The storage device 13 is composed of, for example, a flash memory and a hard disk drive. The storage device 13 stores installed programs and various data and the like. The RAM 12 temporarily stores programs, data, etc. read by the CPU 11.

[0018] The CPU 11 executes the program temporarily stored in the RAM 12 to realize the functions of the dementia risk determination system 1. The CPU 11 controls the input and display device 14 and the acceleration sensor 15 in accordance with the content of the program temporarily stored in the RAM 12. The input and display device 14, in accordance with the content of the program, receives a command from the CPU 11, displays a screen for inputting determination information for dementia risk determination, accepts the input of determination information by the operation of the screen by the person to be determined, and also displays the dementia risk determination result on the screen. The input and display device 14 includes, for example, a touch panel 141 (see FIGS. 5 to 13). When the person to be determined carries the dementia risk determination system 1 and vibration occurs due to walking, the CPU 11 calculates the number of steps from the acceleration value sent from the acceleration sensor 15 in accordance with the content of the program and stores it in the storage device 13.

[0019] Referring to FIG. 2, the dementia risk determination system 1 includes a determination information acquisition means 41, a determination means 42, and a determination result display means 43. The determination information acquisition means 41 acquires the number of steps information calculated from the acceleration value sent from the acceleration sensor 15 and stored in the storage device 13, and determination information such as age information, living alone information, and regular exercise information input by the person to be determined from the input and display device 14. The determination means 42 determines the dementia risk of the person to be determined using the determination information such as the number of steps information, age information, living alone information, and regular exercise information acquired by the determination information acquisition means 41. The determination result display means 43 displays the dementia risk of the person to be determined determined by the determination means 42 on the input and display device 14.

[0020] Referring to FIG. 14, the dementia risk determination system 2 of the present disclosure includes a CPU 11, a RAM 12, a storage device 13, and an input and display device 14. The RAM 12, the storage device 13, and the input and display device 14 are configured to be able to exchange data with the CPU 11 via an internal bus 16. The CPU 11, the RAM 12, the storage device 13, and the input and display device 14 are provided in a single housing. The input and display device 14 includes, for example, a touch panel 141 (see FIGS. 5 to 13). The dementia risk determination system 2 is configured as, for example, a tablet terminal.

[0021] The dementia risk determination system 1 (see FIG. 1) includes an acceleration sensor 15, whereas the dementia risk determination system 2 is different from the dementia risk determination system 1 in that it does not include an acceleration sensor. As shown in FIG. 2, the dementia risk determination system 2 includes a determination information acquisition means 41, a determination means 42, and a determination result display means 43, just like the dementia risk determination system 1.

[0022] In the dementia risk determination system 1, the determination information acquisition means 41 calculates from the acceleration values sent from the acceleration sensor 15 and acquires the step count information stored in the storage device 13. In the dementia risk determination system 2, the determination information acquisition means 41 acquires the step count information input by the person to be determined from the input and display device 14.

[0023] The points that the determination information acquisition means 41 acquires determination information such as age information, living alone information, and regular exercise information input by the person to be determined from the input and display device 14, the determination means 42 determines the dementia risk of the person to be determined using the determination information such as the step count information, age information, living alone information, and regular exercise information acquired by the determination information acquisition means 41, and the determination result display means 43 displays the dementia risk of the person to be determined determined by the determination means 42 on the input and display device 14 are the same as those of the dementia risk determination system 1.

[0024] Referring to FIG. 15, the dementia risk determination system 3 of the present disclosure includes a system main body 31 and an input and display device 14. The system main body 31 includes a CPU 11, a RAM 12, and a storage device 13. The RAM 12, the storage device 13, and the input and display device 14 are configured to be able to exchange data with the CPU 11 via a bus 16. The CPU 11, the RAM 12, and the storage device 13 are provided in a single housing. The system main body 31 is configured as, for example, a personal computer main body, and the input and display device 14 includes, for example, a touch panel 141 (see FIGS. 5 to 13).

[0025] The input and display device 14 is not integrated. As shown in FIG. 16, the input device 141 and the display device 142 may be separate. In this case, for example, the input device 141 may include a keyboard and the display device 142 may include a monitor. In this case, the screen of the monitor has the same configuration as the screen of the touch panel 141 (see FIGS. 5 to 13).

[0026] In the dementia risk determination system 2 (see FIG. 14), the CPU 11, the RAM 12, the storage device 13, and the input and display device 14 are provided in a single housing. In contrast, in the dementia risk determination system 3, the CPU 11, the RAM 12, and the storage device 13 are provided in a single housing, and the input and display device 14 is provided outside the housing. This is different from the dementia risk determination system 2, but other points are the same.

[0027] Also in the dementia risk determination system 3, the determination information acquisition means 41 acquires determination information such as the number of steps information, age information, living alone information, and regular exercise information input by the person to be determined from the input and display device 14. The determination means 42 uses the determination information such as the number of steps information, age information, living alone information, and regular exercise information acquired by the determination information acquisition means 41 to determine the dementia risk of the person to be determined. The determination result display means 43 displays the dementia risk of the person to be determined determined by the determination means 42 on the input and display device 14. These points are the same as those in the dementia risk determination system 2.

[0028] Referring again to FIG. 2, the dementia risk determination system 1 (2, 3) includes a determination information acquisition means 41, a determination means 42, and a determination result display means 43. In the case of the dementia risk determination system 1, the determination information acquisition means 41 calculates from the acceleration values sent from the acceleration sensor 15 and stores the calculated step count information in the storage device 13 (in the case of the dementia risk determination systems 2 and 3, the step count information input by the person to be determined from the input and display device 14), and acquires determination information such as the age information, living alone information, and regular exercise information input by the person to be determined from the input and display device 14. The determination means 42 determines the dementia risk of the person to be determined using the determination information such as the step count information, age information, living alone information, and regular exercise information acquired by the determination information acquisition means 41. The determination result display means 43 displays the dementia risk of the person to be determined determined by the determination means 42 on the input and display device 14.

[0029] Referring to FIG. 3, in the dementia risk determination system 1 (2, 3), first, the determination information acquisition means 41 acquires determination information (step S10), the determination means 42 determines the dementia risk of the person to be determined using the determination information acquired by the determination information acquisition means 41 (step S20), and the determination result display means 43 displays the determination result regarding the dementia risk of the person to be determined determined by the determination means 42 (step S30).

[0030] Next, with reference to FIG. 4, the determination information acquisition step S10 will be further described. The determination information acquisition step S10 includes an age information acquisition step S101 for acquiring the age information of the person to be determined, a living-alone information acquisition step S102 for acquiring information on whether the person to be determined lives alone, a step count information acquisition step S103 for acquiring information on the average number of steps per day of the person to be determined, a regular exercise information acquisition step S104 for acquiring information on how many days per week the person to be determined engages in regular exercise or sports, a weight loss information acquisition step S105 for acquiring information on whether there has been a weight loss of 2 kg or more in the most recent six months for the risk assessment of dementia of the person to be determined, a fall experience information acquisition step S106 for acquiring information on whether there has been a fall experience in the most recent one year for the risk assessment of dementia of the person to be determined, a memory problem information acquisition step S107 for acquiring information on whether the person to be determined has a problem related to memory, and a depression tendency information acquisition step S108 for acquiring information on whether the person to be determined feels that their life is meaningless.

[0031] The age information, living-alone information, step count information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information used here are factors strongly related to the onset of dementia selected by the present inventor from the cohort study database and statistically identified as strongly related factors from a large-scale survey of hundreds of items. By using the determination information related to these factors, it is possible to accurately determine the risk of dementia with as few items as possible.

[0032] Regarding the step count information acquisition step S103, the method by which the determination information acquisition means 41 acquires the step count information is different between the dementia risk assessment system 1 and the dementia risk assessment systems 2 and 3. However, regarding the age information acquisition step S101, the living-alone information acquisition step S102, the regular exercise information acquisition step S104 to the depression tendency information acquisition step S108, the method by which the determination information acquisition means 41 acquires each determination information is the same among the dementia risk assessment systems 1, 2, and 3.

[0033] First, in step S101, the determination information acquisition means 41 acquires age information. The determination information acquisition means 41 displays an age information input screen SC101 for obtaining age information on the touch panel 141. As shown in an example in FIG. 5, the age information input screen SC101 includes a display of "Please enter your age", an age input field W101, and a next button B101. When the age is entered in the age input field W101 by the person to be determined and the next button B101 is pressed, the determination information acquisition means 41 stores the age information in the RAM 12. The value of the age as the value of this age information is referred to as "B1" in the formula (1) for obtaining Probability described later.

[0034] Next, in step S102, the determination information acquisition means 41 acquires living-alone information. The determination information acquisition means 41 displays a living-alone information input screen SC102 for obtaining living-alone information on the touch panel 141. As shown in an example in FIG. 6, the living-alone information input screen SC102 includes a display of "Are you currently living alone? 0: No 1: Yes", a living-alone information input field W102, and a next button B102. When "0" or "1" as living-alone information is entered in the living-alone information input field W102 by the person to be determined and the next button B102 is pressed, the determination information acquisition means 41 stores the care-need certification information in the RAM 12. The "0" or "1" as the value of this care-need certification information is referred to as "B2" in the formula (1) for obtaining Probability described later.

[0035] Next, in step S103, the determination information acquisition means 41 acquires step count information. In the case of the dementia risk determination system 1, the determination information acquisition means 41 acquires the step count information calculated from the acceleration values sent from the acceleration sensor 15 and stored in the storage device 13. The determination information acquisition means 41 obtains the average number of steps per day from the acquired step count information and stores the obtained step count information in the RAM 12. The value of this step count is referred to as "B3" in the formula (1) for obtaining Probability described later.

[0036] In the case of the dementia risk determination systems 2 and 3, the determination information acquisition means 41 displays a step count information input screen SC103 for obtaining step count information on the touch panel 141. As shown in an example in FIG. 7, the step count information input screen includes a display saying "Please enter the average number of steps per day", a step count input field W103, and a next button B103. When the person to be determined enters step count information in the step count input field W103 and presses the next button B103, the determination information acquisition means 41 stores the step count information in the RAM 12. The value of this step count is referred to as "B3" in Equation (1) for obtaining Probability, which will be described later.

[0037] Next, in step S104, the determination information acquisition means 41 acquires regular exercise information. The determination information acquisition means 41 displays a regular exercise information input screen SC104 for obtaining regular exercise information on the touch panel 141. As shown in an example in FIG. 8, the regular exercise information input screen SC104 includes a display saying "How many days a week do you do regular exercise or sports? 1: Every day 2: 5 - 6 days, 3: 2 - 4 days, 4: 1 day or less, 5: Don't do it", a regular exercise information input field W104, and a next button B104. When the person to be determined enters "1" or "2" or "3" or "4" or "5" as regular exercise information in the regular exercise information input field W104 and presses the next button B104, the determination information acquisition means 41 stores the regular exercise information in the RAM 12. The "1" or "2" or "3" or "4" or "5" as the value of this exercise habit information is referred to as "B4" in Equation (1) for obtaining Probability, which will be described later.

[0038] Next, in step S105, the determination information acquisition means 41 acquires weight loss information. The determination information acquisition means 41 displays a weight loss information input screen SC105 for obtaining weight loss information on the touch panel 141. As shown in an example in FIG. 9, the weight loss information input screen SC105 includes a display of "Have you lost 2 kg or more in weight in the past six months? 0: No 1: Yes", a weight loss information input field W105, and a next button B105. When "0" or "1" as weight loss information is input into the weight loss information input field W105 by the person to be determined and the next button B105 is pressed, the determination information acquisition means 41 stores the weight loss information in the RAM 12. "0" or "1" as the value of this weight loss information is referred to as "B5" in Expression (1) for obtaining Probability described later.

[0039] Next, in step S106, the determination information acquisition means 41 acquires fall experience information. The determination information acquisition means 41 displays a fall experience information input screen SC106 for obtaining fall experience information on the touch panel 141. As shown in an example in FIG. 10, the fall experience information input screen SC106 includes a display of "Have you had an experience of falling in the past year? 0: No 1: Yes" and "※Falling means that the balance of the body is lost and a part of the body other than the feet (such as hands, knees, etc.) touches the ground", a fall experience information input field W106, and a next button B106. When "0" or "1" as fall experience information is input into the fall experience information input field W106 by the person to be determined and the next button B106 is pressed, the determination information acquisition means 41 stores the fall experience information in the RAM 12. "0" or "1" as the value of this fall experience information is referred to as "B6" in Expression (1) for obtaining Probability described later.

[0040] Next, in step S107, the determination information acquisition means 41 acquires memory problem information. The determination information acquisition means 41 displays a memory problem information input screen SC107 for obtaining the memory problem information on the touch panel 141. As shown in an example in FIG. 11, the memory problem information input screen SC107 includes a display of "Do you have any problems with memory? 0: None 1: Yes", a memory problem information input field W107, and a next button B107. When "0" or "1" as the presence / absence information of a memory-related problem is input into the memory problem information input field W107 by the person to be determined and the next button B107 is pressed, the determination information acquisition means 41 stores the memory problem information in the RAM 12. "0" or "1" as the value of this memory problem information is referred to as "B7" in the formula (1) for obtaining Probability described later.

[0041] Next, in step S108, the determination information acquisition means 41 acquires depression tendency information. The determination information acquisition means 41 displays a depression tendency information input screen SC108 for obtaining the depression tendency information on the touch panel 141. As shown in an example in FIG. 12, the depression tendency information input screen SC108 includes a display of "Do you feel that your life is meaningless?", a depression tendency information input field W108, and a next button B108. When it is input into the depression tendency information field W108 by the person to be determined whether they feel that their life is meaningless and the next button B108 is pressed, the determination information acquisition means 41 stores the depression tendency information in the RAM 12. "0" or "1" as the value of this depression tendency information is referred to as "B8" in the formula (1) for obtaining Probability described later.

[0042] Next, the awareness risk determination step S20 (see FIG. 3) will be further described. In the awareness risk determination step S20, using the determination information acquired by the determination information acquisition means 41 in the above-described determination information acquisition step S10 and stored in the RAM 12, the determination means 42 calculates the Probability used for the determination of the awareness risk using the following prediction model formula (1) and stores it in the RAM 12.

[0043] Probability = 1 / (1+e-a ) (1) Here, a = ((A1 × B1) + (A2 × B2) + (A3 × B3) + (A4 × B4) + (A5 × B5) + (A6 × B6) + (A7 × B7) + (A8 × B8) + (A9)).

[0044] B1 to B8 are values obtained by quantifying age information, living alone information, number of steps information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information as determination information as described above, respectively.

[0045] A1 is preferably 0.05 or more and 0.06 or less, A2 is preferably 0.2 or more and 0.4 or less, A3 is preferably -0.0003 or more and -0.0001 or less, A4 is preferably 0.1 or more and 0.2 or less, A5 is preferably 0.5 or more and 0.8 or less, A6 is preferably 0.5 or more and 0.8 or less, A7 is preferably 0.8 or more and 1.2 or less, A8 is preferably 1.1 or more and 1.5 or less, and A9 is preferably -8 or more and -7 or less.

[0046] This prediction model formula is obtained using logistic regression analysis, and the outcome uses the case where a diagnosis of dementia is made on the receipt.

[0047] Next, using the Probability obtained in this way, the determination means 42 determines the risk of dementia of the person to be determined.

[0048] For example, using the 5th percentile of Probability, depending on the value of Probability, it is determined as any one of "no risk of dementia", "almost no risk of dementia", "average risk of dementia", "some risk of dementia", "risk of dementia", and the determination result is stored in the RAM12.

[0049] Alternatively, for example, using the quartiles of Probability, depending on the value of Probability, it is determined as any one of "no risk of dementia", "almost no risk of dementia", "slight risk of dementia", and "risk of dementia", and the determination result is stored in the RAM 12.

[0050] Next, the determination result display step S30 (see FIG. 3) will be further described. In the determination result display step S30, the determination result display means 43 displays a determination result display screen SC109 for displaying the determination result of the dementia risk of the person to be determined determined by the determination means 42 in the above-described dementia risk determination step S20 on the touch panel 141. As shown in an example in FIG. 13, the determination result display screen SC109 includes a display saying "The determination result of your current dementia risk is as follows" and a determination result display column W109 for displaying the determination result. The determination result display means 43 displays the determination result stored in the RAM 12 in the determination result display column W109. For example, when the determination result is "risk of dementia", as shown in FIG. 13, "risk of dementia" is displayed in the determination result display column W109.

[0051] Furthermore, as shown in FIG. 13, the determination result display screen SC109 may include a display saying "If you wish, you can determine the risk of dementia when you age, or when you change the number of steps per day or the number of days of regular exercise / sports. Do you want to continue? If you want to continue, press 'Continue', and if you don't want to continue, press 'End'.", a continue button B109, and an end button B110.

[0052] When the end button B110 is pressed by the person to be determined, the dementia risk determination ends.

[0053] When the continuation button B109 is pressed by the person to be judged, in any of the dementia risk determination systems 1, 2, and 3, the determination information acquisition means 41 executes the age information acquisition step (step S101) to the depression tendency information step (step S108) to acquire new determination information (step S10). Using the newly acquired determination information, the determination means 42 newly determines the dementia risk of the person to be judged (step S20), and the determination result display means 43 newly displays the determination result regarding the dementia risk of the person to be judged newly determined by the determination means 42 (step S30). For example, if the person to be judged inputs new step count information, new regular exercise information, etc., and the determination information acquisition means 41 acquires new determination information, and the dementia risk of the person to be judged newly determined by the determination means 42 using this new determination information is "slightly at risk of dementia", the determination result display means 43 displays "slightly at risk of dementia" in the determination result display column W109 (see FIG. 13).

[0054] In this way, if the dementia risk determination result is improved by the person to be judged inputting new determination information, the behavioral change of the person to be judged can be expected, and the usefulness of the dementia risk determination systems 1, 2, and 3 increases.

[0055] The dementia risk determination system of the present disclosure described above selects factors strongly related to the onset of dementia from the cohort study database and statistically identifies strongly related factors from a large-scale survey of hundreds of items. By using the determination information related to the above factors, it is a system that can determine the dementia risk simply and with high accuracy using a determination index with as few items as possible.

[0056] By publicly disclosing this system and having many elderly people use it, it can contribute to health promotion such as dementia prevention. If an inexpensive and introducible system is publicly disclosed and can be effective for care prevention, it may also be effective in optimizing social security costs.

[0057] Although various exemplary embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments. Therefore, the scope of the present invention is limited only by the following claims.

Explanation of Signs

[0058] 1, 2, 3… Dementia risk determination system 41… Determination information acquisition means 42… Determination means 43… Determination result display means

Claims

【Claim 1】 Determination information acquisition means for acquiring age information, information on whether living alone or not, step count information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information of a person to be determined for the risk of dementia; Determination means for determining the risk of dementia of the person to be determined using the age information, information on whether living alone or not, step count information, regular exercise information, weight loss information, fall experience information, memory problem information, and depression tendency information acquired by the determination information acquisition means; A dementia risk determination device comprising determination result display means for displaying the risk of dementia of the person to be determined determined by the determination means, The step count information is the average number of steps per day, the regular exercise information is information on how many days per week regular exercise or sports are performed, the weight loss information is information on whether there has been a weight loss of 2 kg or more in the most recent 6 months for dementia risk determination, the fall experience information is information on the presence or absence of a fall experience in the most recent 1 year for dementia risk determination, the memory problem information is information on whether there are problems related to memory, and the depression tendency information is information on whether one feels that one's life is meaningless; Let the value of the age of the person to be determined be "B1" as the value of the age information; Regarding whether the person to be determined lives alone or not, if "no", then "0", if "living alone", then "1", and let it be "B2" as the value of the information on whether living alone or not; Let the average number of steps per day of the person to be determined be "B3" as the value of the step count information; Regarding how many days per week the person to be determined performs regular exercise or sports, if "every day", then "1", if "5 - 6 days", then "2", if "2 - 4 days", then "3", if "less than 1 day", then "4", if "not doing", then "5", and let it be "B4" as the value of the regular exercise information; Regarding whether the person to be determined has had a weight loss of 2 kg or more in the most recent 6 months for dementia risk determination, if "no", then "0", if "yes", then "1", and let it be "B5" as the value of the weight loss information; Regarding whether the person to be determined has had a fall experience in the most recent 1 year for dementia risk determination, if "yes", then "1", if "no", then "0", and let it be "B6" as the value of the fall experience information; Regarding whether the person to be determined has problems related to memory, if "has", then "1", if "has not", then "0", and let it be "B7" as the value of the memory problem information; If the subject "feels" that their life is meaningless, then "1"; if they "do not feel" so, then "0" is used as "B8" which is the value of the depression tendency information. The determination means uses the following formula (1) Probability = 1 / (1+e －ａ ) (1) (where a = ((A1 × B1) + (A2 × B2) + (A3 × B3) + (A4 × B4) + (A5 × B5) + (A6 × B6) + (A7 × B7) + (A8 × B8) + (A9))), A1 is greater than or equal to 0.05 and less than or equal to 0.06, A2 is greater than or equal to 0.2 and less than or equal to 0.4, A3 is greater than or equal to -0.0003 and less than or equal to -0.0001, A4 is greater than or equal to 0.1 and less than or equal to 0.2, A5 is greater than or equal to 0.5 and less than or equal to 0.8, A6 is greater than or equal to 0.5 and less than or equal to 0.8, A7 is greater than or equal to 0.8 and less than or equal to 1.2, A8 is greater than or equal to 1.1 and less than or equal to 1.5, A9 is greater than or equal to -8 and less than or equal to -7). A dementia risk determination device that calculates the value of Probability according to the following formula and determines the risk of dementia according to the quantile of the calculated Probability.

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