PROBLEM TO BE SOLVED: To specify an obesity index of a subject having a high obesity degree with a high degree of accuracy.SOLUTION: An abdomen width specifying part 642 specifies an abdomen width AW of the subject. A shape index calculating part 644 calculates a shape index &sigma corresponding to a cross-sectional shape of an abdomen of the subject. An obesity determining part 662 determines whether an obesity degree of the subject is high or low. An obesity index calculating part 664 calculates an obesity index corresponding to the abdomen width AW by using a first computing equation if the obesity determining part 662 determines that the obesity degree is low and calculates an obesity index corresponding to the abdomen width AW and the shape index &sigma by using a second computing equation different from the first computing equation if the obesity determining part 662 determines that the obesity degree is high.COPYRIGHT: (C)2012,JPO&INPIT【課題】肥満度が高い被験者についても高精度に肥満指標を特定する。【解決手段】腹部幅特定部642は、被験者の腹部幅AWを特定する。形状指標算定部644は、被験者の腹部の断面形状に応じた形状指標σを算定する。肥満判定部662は、被験者の肥満度の高低を判定する。肥満指標算定部664は、肥満度が低いと肥満判定部662が判定した場合に、第1演算式を利用して腹部幅AWに応じた肥満指標を算定し、肥満度が高いと肥満判定部662が判定した場合に、第1演算式とは相違する第2演算式を利用して腹部幅AWおよび形状指標σに応じた肥満指標を算定する。【選択図】図5
