Williams Daniel P, Going Scott B, Lohman Timothy G, Hewitt Michael J, Haber Ann E
Department of Exercise and Sport Sciences, University of Arizona, Tucson, Arizona 85721.
Am J Hum Biol. 1992;4(5):595-605. doi: 10.1002/ajhb.1310040505.
The relationship of skinfold thicknesses and body density to body fatness was assessed, and skinfold prediction equations were developed for the estimation of body fatness determined from measures of body density, total body water, and bone mineral in a sample of 91 males and 116 females aged 34-84 years. For a given skinfold thickness, adjustment for individual deviations in the water and bone mineral fractions of the fat-free body assumed constant by traditional body composition models resulted in absolute reductions in overstimates of body fatness from 4.5 to 1.9% in females and from 2.8 to 1.7% in males for every 15 year increase in age. Percentage fat from density, water, and bone was estimated from skinfold thicknesses with SEEs of 2.9% in males and 3.8% in females. When compared to percentage fat from our multicomponent-derived criterion, percentage fat from body density and a two-component model resulted in individual errors ranging from underestimates of 5.6% fat to overestimates of 14.0% fat. The multicomponent prediction equations presented herein should produce more valid estimates of body composition in middle-aged and older men and women than equations based on two-component models. © 1992 Wiley-Liss, Inc.
评估了皮褶厚度和身体密度与身体脂肪含量的关系，并针对91名年龄在34至84岁之间的男性和116名女性样本，开发了皮褶预测方程，用于根据身体密度、总体水和骨矿物质测量值估算身体脂肪含量。对于给定的皮褶厚度，按照传统身体成分模型假设无脂肪身体的水和骨矿物质部分个体偏差恒定进行调整后，随着年龄每增加15岁，女性身体脂肪含量高估的绝对减少幅度从4.5%降至1.9%，男性从2.8%降至1.7%。根据皮褶厚度估算的来自密度、水和骨的脂肪百分比，男性的估计标准误差为2.9%，女性为3.8%。与我们多成分推导标准得出的脂肪百分比相比，身体密度和双成分模型得出的脂肪百分比导致个体误差范围从低估5.6%脂肪到高估14.0%脂肪。本文提出的多成分预测方程应该比基于双成分模型的方程能更有效地估算中老年男性和女性的身体成分。© 1992威利 - 利斯公司。
