体組成計による肥満評価とメタボリックシンドローム血中パラメーターとの関係

抄録

Bioelectrical impedance analysis (BIA) is widely used for assessing the total body, and sometimes visceral, fat content. However the reliability of the results remains to be confirmed, especially for their relationship to the blood parameters associated with obesity and metabolic syndrome. We analyzed the relationship between some blood parameters and the body fat content evaluated by standard X-ray computed tomography (CT) and BIA. Fifty-eight male and 52 female healthy subjects (20-72 years old with a body mass index of 16.3-30.6 kg/m²) underwent both CT and BIA. The visceral fat content was consistently higher in the males than females, regardless of the method used. However, the absolute value by BIA was higher than that by CT. The total and visceral fat contents of the females assessed by CT were positively correlated with the blood leptin, glucose, HbA1c and triglyceride levels, and negatively with adiponectin. The total and visceral fat contents of the males were also positively correlated with the leptin, HbA1c, triglyceride, and insulin levels, and negatively with adiponectin and HDL cholesterol. Similar correlations were also found for the males when the fat contents were assessed by BIA. However, apparently different relationships were found for the females when assessed by BIA compared with those by CT. Assessing body fat by BIA may give some results different from those estimated by the standard CT method, particularly for the relationship with obesity-associated blood parameters.