Department of Nutrition, Hospitality, and Retailing, Texas Tech University, Lubbock.
Intramural Research Program, National Institute on Aging of the National Institutes of Health, Baltimore, Maryland.
J Gerontol A Biol Sci Med Sci. 2014 Sep;69(9):1069-75. doi: 10.1093/gerona/glt165. Epub 2013 Oct 24.
A new body adiposity index (BAI = (hip circumference)/((height)(1.5)) - 18) has been developed and validated in adult populations. We aimed to assess the validity of BAI in an older population. We compared the concordance correlation coefficient between BAI, body mass index (BMI), and percent body fat (fat%; by dual-energy X-ray absorptiometry) in an older population (n = 954) participating in the Baltimore Longitudinal Study of Aging. BAI was more strongly correlated with fat% than BMI (r of .7 vs .6 for BAI vs BMI and fat%, respectively, p < .01) and exhibited a smaller mean difference from fat% (-5.2 vs -7.6 for BAI vs BMI and fat%, respectively, p < .01) indicating better agreement. In men, however, BMI was in better agreement with fat% (r of .6 vs .7 for BAI vs BMI and fat%, respectively, p < .01) with a smaller mean difference from fat% (-3.0 vs -2.2 for BAI vs BMI and fat%, respectively, p < .01). Finally, BAI did not accurately predict fat% in people with a fat% below 15%. BAI provides valid estimation of body adiposity in an older adult population; however, BMI may be a better index for older men. Finally, BAI is not accurate in people with extremely low or high body fat percentages.
一种新的体脂指数（BAI =（臀围）/（（身高）（1.5））-18）已经在成年人群中开发和验证。我们旨在评估该指数在老年人群中的有效性。我们比较了体脂指数（BMI）和体脂百分比（fat%；通过双能 X 射线吸收法）与 BAI 在参与巴尔的摩纵向老龄化研究的老年人群（n = 954）中的一致性相关系数。BAI 与 fat%的相关性强于 BMI（BAI 与 BMI 和 fat%的相关系数分别为.7 和.6，p <.01），与 fat%的平均差异较小（BAI 与 BMI 和 fat%的平均差异分别为-5.2 和-7.6，p <.01），表明一致性更好。然而，在男性中，BMI 与 fat%的一致性更好（BAI 与 BMI 和 fat%的相关系数分别为.6 和.7，p <.01），与 fat%的平均差异较小（BAI 与 BMI 和 fat%的平均差异分别为-3.0 和-2.2，p <.01）。最后，BAI 不能准确预测 fat%低于 15%的人群的 fat%。BAI 可以为老年人群提供准确的体脂评估；然而，对于老年男性，BMI 可能是更好的指标。最后，BAI 在体脂百分比极低或极高的人群中不够准确。
