Percentage body fat and results of a periodic health examination

肥満や栄養過剰は多くの慢性疾患、とりわけ成人病と関連が強いことが従来から指摘されている。肥満の判定には体脂肪率を測定することが重要であるが、その方法の一つとして、集団検診に使用しやすい生体電気インピーダンス法（bioelectrical impedance analysis）がある。今回、1ビール製造工場の定期健康診断において、対象者男235人および女137人の体脂肪率をこの方法により測定した。まずこの体脂肪率とBMIおよび肥満度との相関関係を求め、男性より女性において相関が高いことを認めた。ついで肥満群と正常群に分けて、血圧および血液検査の異常率の出現頻度を統計的に比較したところ、肥満群では男女共に総コレステロールで、また男性では尿酸、γGTP、SGPTの各値で、異常者が高率であることを認めた。またSGPTは30才台から、γGTP及びTchは40才台からその傾向が見られた。しかし、肥満指数とこれらの検査値との相関係数は高くはなかった。Data from periodic health examinations such as ALP, UA, RBC, Hb, SGOT, SGPT, Tch(total choresterol), TG(triglyceride), blood pressure, body length, body weight and also percentage body fat(% Fat) as measured by bioelectrical impedance mehtod were obtained from 235 male and 137 female workers at a brewery factory in Okayama Prefecture and results were analyzed. The correlation coefficients for % Fat and Body Mass Index values(BMI) are found to be 0.678 for males and 0.803 for females. Examinees were then devided into normal and obesity groups respectively, and the frequency of values over normal ranges (classified by obesity indicators such as % Fat, BMI and obesity rate calculated from standard weight) were statistically compared. Results showed that % Fat and BMI were more sensitive than obesity rate and that the obesity group had statistically high frequencies of abnormality in some of the data as in the case of SGPT, γGTP and TG compared to the control group. Furthermore this tendency was found to be more significant among male workers than female ones