Texas Obesity Research Center, Department of Health and Human Performance, University of Houston, Houston, TX, USA.
Med Sci Sports Exerc. 2011 Sep;43(9):1785-90. doi: 10.1249/MSS.0b013e318216d90f.
BACKGROUND/INTRODUCTION: The purpose of this study was to examine the race/ethnicity bias of using waist circumference (WC) to estimate abdominal fat.
A total of 771 females and 484 males (17-35 yr) were tested one to three times during a prescribed 30-wk aerobic exercise program. The race/ethnicity distribution for women was non-Hispanic white, 29%; Hispanic, 25%; African American (AA), 35%; Asian Indian, 3%; and Asian, 8%. The distribution for men was non-Hispanic white, 37%; Hispanic, 26%; AA, 22%; Asian Indian, 5%; and Asian, 10%. Abdominal fat (L1-L5) was estimated from whole-body scanning using dual-energy x-ray absorptiometry (DXA Abd-Fat).
DXA Abd-Fat varied by race/ethnicity after accounting for WC and height in both women and men. The increase in DXA Abd-Fat per increase in WC was lower in the Asian and Asian-Indian women than that in the other women. The increase in DXA Abd-Fat per increase in WC was higher in the AA men and lower in the Asian-Indian men than that in the other men. These differential race/ethnicity effects were most notable when WC exceeded ≍90 cm in the women and ≍100 cm in the men, values which are consistent with current definitions of abdominal obesity in the United States.
Prediction equations for abdominal fat using WC that do not account for race/ethnicity group provide biased estimates. These results may affect assessment of disease risk from abdominal obesity among racial/ethnic groups.
背景/引言：本研究旨在探讨使用腰围（WC）估计腹部脂肪时存在的种族/民族偏见。
共有 771 名女性和 484 名男性（17-35 岁）在规定的 30 周有氧运动计划中接受了一次至三次测试。女性的种族/民族分布为非西班牙裔白人，占 29%；西班牙裔，占 25%；非裔美国人（AA），占 35%；印度裔，占 3%；和亚洲人，占 8%。男性的种族/民族分布为非西班牙裔白人，占 37%；西班牙裔，占 26%；AA，占 22%；印度裔，占 5%；和亚洲人，占 10%。腹部脂肪（L1-L5）使用双能 X 射线吸收法（DXA Abd-Fat）从全身扫描中估算。
在考虑了 WC 和身高后，DXA Abd-Fat 在女性和男性中因种族/民族而异。在所有女性中，WC 每增加 1cm，DXA Abd-Fat 的增加量在亚裔和印度裔女性中较低。在 AA 男性中，WC 每增加 1cm，DXA Abd-Fat 的增加量较高，而在印度裔男性中则较低。当女性的 WC 超过 ≍90cm 且男性的 WC 超过 ≍100cm 时，这些种族/民族差异的影响最为明显，这些值与美国目前对腹部肥胖的定义一致。
不考虑种族/民族组的 WC 用于腹部脂肪的预测方程提供了有偏差的估计。这些结果可能会影响对不同种族/民族群体腹部肥胖相关疾病风险的评估。
