Patent ID: 7932472

Claim:
A measurement apparatus having a measurer that measures an index relating to body compositions of a human subject, comprising: a memory storage device that stores a measurement result of the measurer; an identifier that uniquely identifies each of plural human subjects by identification information; a storage instructor that instructs the measurement apparatus to store in the memory storage device a measurement result measured by the measurer as the base value; a difference output instructor that instructs the measurement apparatus to output difference between a previous measurement result and a current measurement result, the previous measurement result measured by the measurer being a base value and the current measurement result measured by the measurer being a comparison value; and a difference outputter that, in a case in which the measurement apparatus is instructed to output the difference by the difference output instructor and in a case in which one of the plural human subjects is specified by the identifier, reads from the memory storage device a measurement result that has been stored in association with the specified identification information as the base value and that calculates the difference between the base value and the comparison value, wherein, only in a case in which the measurement apparatus is instructed by the storage instructor to store a measurement result measured by the measurer and in a case in which one of the plural human subjects is specified by the identifier, will the memory storage device store the measurement result in association with the specified identification information, and wherein the storage instructor comprises a memory key in common for all of the plural human subjects, and the identifier comprises an individual key corresponding to each of the plural human subjects.