Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA.
Obesity (Silver Spring). 2012 Apr;20(4):900-3. doi: 10.1038/oby.2011.346. Epub 2011 Nov 17.
The body adiposity index (BAI; hip circumference (cm)/height (m)(1.5) - 18) has recently been shown to demonstrate a stronger correlation with percentage body fat (%fat) than that between the BMI and %fat in Mexican-American adults. Here, we compare the concordance between %fat from dual-energy X-ray absorptiometry (DXA) and BAI, and between %fat and BMI, in European-American adults (n = 623). Agreement between BAI, BMI, and %fat was assessed using Lin's concordance coefficients (ρ(c)), where values <0.90 are considered poor. In the sample as a whole, the agreement between BAI and %fat (ρ(c) = 0.752) was far better than that between BMI and %fat (ρ(c) = 0.445) but was nonetheless relatively poor. There were large mean differences in %fat between the BAI and DXA %fat, particularly at lower levels of adiposity (<20%), and further the BAI overestimated %fat in males and underestimated %fat in females. Optimizing the BAI formula for our sample only marginally improved performance. Results of the present study show that BAI provides a better indicator of adiposity in European-American adults than does BMI, but does not provide valid estimates of %fat, particularly at lower levels of body fatness. Further research is warranted to investigate the predictive ability of BAI for various health outcomes.
体脂肪指数（BAI；臀围（cm）/身高（m）（1.5）-18）最近显示与墨西哥裔美国成年人的体脂肪百分比（%fat）之间的相关性比 BMI 与 %fat 之间的相关性更强。在这里，我们比较了欧洲裔成年人中双能 X 射线吸收法（DXA）和 BAI 之间的 %fat 一致性，以及 BMI 和 %fat 之间的一致性（n = 623）。使用林氏一致性系数（ρ（c））评估 BAI、BMI 和 %fat 之间的一致性，其中<0.90 值被认为是较差的。在整个样本中，BAI 和 %fat 之间的一致性（ρ（c）=0.752）远远好于 BMI 和 %fat 之间的一致性（ρ（c）=0.445），但仍然相对较差。BAI 和 DXA %fat 之间的 %fat 存在较大的平均差异，尤其是在较低的肥胖水平（<20%）下，并且 BAI 高估了男性的 %fat，低估了女性的 %fat。仅对我们的样本优化 BAI 公式略微提高了性能。本研究的结果表明，BAI 比 BMI 提供了一个更好的欧洲裔成年人肥胖指标，但不能提供 %fat 的有效估计值，尤其是在较低的体脂水平下。需要进一步研究以调查 BAI 对各种健康结果的预测能力。
