The present invention relates to a device (12) for determining a
state of health of a patient (11), comprising: an input interface (16) for receiving a
glucose measurement value with information relating to a glucose level of the patient and a
glucose uptake input value with information relating to a
glucose uptake of the patient; an
estimation unit (18) for determining the
state of health of the patient on the basis of the received values and a predefined
state model, which represents the
state of health of the patient by means of a
state vector and using a plurality of
model parameters, wherein the
state vector comprises a glucose model value with information relating to the glucose level of the patient and can comprise an
insulin model value with information relating to the
insulin level of the patient; a comparison unit (20) for determining a deviation between the
glucose measurement value and the glucose model value; and an individualization unit (22) for the patient-specific update of a
model parameter on the basis of the determined deviation. Further
model parameters can comprise individual glucose or
insulin sensitivities, the
incretin sensitivity and sensitivities with respect to lifestyle input values. The present invention also relates to a
system (10) and to a method for determining a state of health of a patient (11).