Total Body Fat Estimated by Means of Densitometry and Skinfold Thickness Method in Middle Aged Housewives

밀도법 및 피부두겹법에 의한 중년부인의 총지방량 측정

Total body fat measurements were performed in 342 housewives. In 44 of them(age 38.4 yr.) both the densitometry and skinfold thickness methods were made and regression equations between skinfold and total body fat were derived. In the 298 housewives(age 35.0 yr.) skinfold thickness at four sites (arm, back, waist, abdomen) were measured and total body fat was calculated. The following results were obtained. 1. The data in 44 subjects by means of densitometry and skinfold thickness were: body weight: 51.8 kg, body length: 153.4 cm, body surface area: $1.47\;m^2$, body volume: 50.2 l, body density: 1.0334 kg/l, total body fat: 25.2% body weight, mean skinfold thickness at four sites 14.9 mm. 2. There were correlations of high degree between skinfold thickness and fat (%), fat (kg), and body density. The correlation coefficients were r=0.767, r=0.846, r= -0.765, respectively. Subsequently, the following regression equations were obtained. %fat=$0.39{\times}Mean$ skinfold thickness(mm)+19.36 Fat(kg)=$0.414{\times}Mean$ skinfold thickness(mm)+7.01 Body density=$-0.00099{\times}Mean$ skinfold thickness(mm)+1.0489 3. In 298 subjects mean skinfold thickness of four sites was 20.6mm and total body fat was calculated as 27.4% body weight from the above equation.