Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.
Nutr Diabetes. 2013 Mar 18;3(3):e64. doi: 10.1038/nutd.2013.5.
The aim of this study was to determine whether the quantity of fat is different across the central (that is, android, trunk) and peripheral (that is, arm, leg and gynoid) regions among young African-American (AA), Asian (AS), Hispanic (HI) and non-Hispanic White (NHW) men.
A cohort of 852 men (18-30 years; mean total body fat percent (TBF%)=18.8±7.9, range=3.7-45.4) were assessed for body composition in five body regions via dual-emission X-ray absorptiometry (DXA).
HI men (21.8±8.3) had higher TBF% than AA (17.0±10.0), NHW (17.9±7.2) and AS (18.9±8.0) groups (P-values <0.0001). AS had a lower BMI (23.9±3.4) than all other groups, and NHW (24.7±3.2) had a lower BMI than HI (25.7±3.9) and AA (26.5±4.7; P-values<0.0001). A linear mixed model (LMM) revealed a significant ethnicity by region fat% interaction (P<0.0001). HI men had a greater fat% than NHW for every region (adjusted means (%); android: 29.6 vs 23.3; arm: 13.3 vs 10.6; gynoid: 27.2 vs 23.8; leg: 21.2 vs 18.3; trunk: 25.5 vs 20.6) and a greater fat% than AA for every region except the arm. In addition, in the android and trunk regions, HI had a greater fat% than AS, and AS had a higher fat% than AA. Finally, the android fat% for AS was higher than that of NHW. When comparing the region fat% within ethnicities, the android region was greater than the gynoid region for AS and HI, but did not differ for AA and NHW, and the arm region had the least fat% in all ethnicities.
Fat deposition and body fat patterning varies by ethnicity.
本研究旨在确定年轻非裔美国人（AA）、亚裔（AS）、西班牙裔（HI）和非西班牙裔白人（NHW）男性的中心（即安卓部，躯干）和外周（即臂部、腿部和臀）区域之间的脂肪量是否存在差异。
通过双能 X 射线吸收法（DXA）对 852 名年龄在 18-30 岁的男性（平均总体脂肪百分比（TBF%）=18.8±7.9，范围为 3.7-45.4）的身体成分进行了五个身体区域的评估。
HI 男性（21.8±8.3）的 TBF%高于 AA（17.0±10.0）、NHW（17.9±7.2）和 AS（18.9±8.0）组（P 值均<0.0001）。AS 的 BMI（23.9±3.4）低于其他所有组，而 NHW 的 BMI（24.7±3.2）低于 HI（25.7±3.9）和 AA（26.5±4.7；P 值均<0.0001）。线性混合模型（LMM）显示，脂肪百分比的种族和区域之间存在显著的交互作用（P<0.0001）。HI 男性的每个区域的脂肪百分比均高于 NHW（调整后的平均值（%）；安卓部：29.6 比 23.3；臂部：13.3 比 10.6；臀部：27.2 比 23.8；腿部：21.2 比 18.3；躯干：25.5 比 20.6），除了臂部，每个区域的脂肪百分比均高于 AA。此外，在安卓部和躯干部，HI 男性的脂肪百分比高于 AS，而 AS 的脂肪百分比高于 AA。最后，AS 的安卓部脂肪百分比高于 NHW。在比较不同种族的区域脂肪百分比时，AS 和 HI 的安卓部脂肪百分比大于臀部，而 AA 和 NHW 则没有差异，且所有种族的臂部脂肪百分比最低。
脂肪沉积和体脂分布因种族而异。
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