Scherf J, Franklin B A, Lucas C P, Stevenson D, Rubenfire M
Am J Clin Nutr. 1986 Jan;43(1):128-35. doi: 10.1093/ajcn/43.1.128.
To assess the validity of skinfold thickness estimates of body fatness in formerly morbid obese adults, 23 patients (17 women, 6 men) who had completed a protein-sparing modified fast were studied. Mean +/- SD weight loss was 60.7 +/- 20.6 kg for men and 42.6 +/- 11.5 kg for women. Body density and percent body fatness were determined after weight loss according to four commonly used skinfold equations: Pollock (P); Durnin-Rahaman (D-R); Durnin-Womersley (D-W); and, Jackson-Pollock (J-P). The validity of these measurements was assessed by hydrostatic weighing, which revealed a percent body fatness of 20.4 +/- 6.5 for men and 29.8 +/- 8.4 for women. The mean difference and total error (square root of the mean of squared deviations) between skinfold predicted and hydrostatically-determined percent body fatness for each skinfold equation were: P, 2.0 and 4.9; D-R, 4.2 and 6.6; D-W, 7.1 and 8.4; and, J-P, 0.7 and 4.4. With the exception of the latter equation, all significantly overestimated (p less than 0.01) hydrostatically-determined percent body fatness.
Select skinfold equations may result in a marked overestimation of body fatness in formerly obese patients.
为评估曾患病态肥胖的成年人通过皮褶厚度估计体脂率的有效性，对23名完成了蛋白质节省型改良禁食的患者（17名女性，6名男性）进行了研究。男性平均体重减轻±标准差为60.7±20.6千克，女性为42.6±11.5千克。体重减轻后，根据四个常用的皮褶公式确定身体密度和体脂百分比：波洛克公式（P）；杜宁-拉赫曼公式（D-R）；杜宁-沃姆斯利公式（D-W）；以及杰克逊-波洛克公式（J-P）。通过水下称重评估这些测量的有效性，结果显示男性体脂百分比为20.4±6.5，女性为29.8±8.4。每个皮褶公式预测的皮褶厚度与水下测定的体脂百分比之间的平均差异和总误差（平方偏差均值的平方根）分别为：P公式，2.0和4.9；D-R公式，4.2和6.6；D-W公式，7.1和8.4；J-P公式，0.7和4.4。除了后一个公式外，所有公式均显著高估（p<0.01）水下测定得出的体脂百分比。
某些皮褶公式可能会导致对曾患肥胖症患者的体脂率出现显著高估。
