Similarity in Percent Body Fat Between White and Vietnamese Women: Implication for a Universal Definition of Obesity
Similarity in Percent Body Fat Between White and Vietnamese Women: Implication for a Universal Definition of Obesity
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DOI：
10.1038/oby.2010.19
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发表时间：
2010-06-01
期刊：
影响因子：
6.9
通讯作者：
Nguyen, Tuan V.
中科院分区：
文献类型：
--
作者：
Ho-Pham, Lan T.;Lai, Thai Q.;Nguyen, Tuan V.
人们普遍认为，对于给定的BMI，亚洲人的体脂百分比（PBF）高于白人，并且定义亚洲人肥胖的BMI阈值应该低于白人的阈值。本研究试图通过比较美国白色和越南妇女的PBF来验证这一假设。这项研究被设计为一项比较性的横断面调查。在第一项研究中，从胡志明市（越南）的各个地区随机选择了210名年龄在50岁至85岁之间的越南妇女。在第二项研究中，从Rancho Bernardo研究（加利福尼亚州圣地亚哥）中随机选择了419名相同年龄范围的女性。在这两项研究中，通过双能X射线吸收测定法（DXA）（QDR 4500; Hologic）测量瘦体重（LM）和脂肪量（FM）。PBF推导为FM除以体重。与越南女性相比，白色女性的FM（24.8 +/- 8.1 kg vs. 18.8 +/- 4.9 kg; P < 0.0001）和PBF（36.4 +/- 6.5% vs. 35.0 +/- 6.2%; P = 0.012）更高。然而，在BMI匹配（35.1 +/- 6.2% vs. 35.0 +/- 5.7%; P = 0.87）或年龄和BMI匹配（35.6 +/- 5.1% vs. 35.8 +/- 5.9%; P = 0.79）后，两组之间的PBF无显著差异。使用BMI = 30的标准，19%的美国白色女性和5%的越南女性被归类为肥胖。大约54%的美国白色女性和53%的越南女性PBF >35%（P = 0.80）。尽管白色女性的BMI、体重和FM高于越南女性，但她们的PBF几乎相同。需要进一步的研究来得出更合适的BMI阈值来定义亚洲女性的肥胖。
It has been widely assumed that for a given BMI, Asians have higher percent body fat (PBF) than whites, and that the BMI threshold for defining obesity in Asians should be lower than the threshold for whites. This study sought to test this assumption by comparing the PBF between US white and Vietnamese women. The study was designed as a comparative cross-sectional investigation. In the first study, 210 Vietnamese women ages between 50 and 85 were randomly selected from various districts in Ho Chi Minh City (Vietnam). In the second study, 419 women of the same age range were randomly selected from the Rancho Bernardo Study (San Diego, CA). In both studies, lean mass (LM) and fat mass (FM) were measured by dual-energy X-ray absorptiometry (DXA) (QDR 4500; Hologic). PBF was derived as FM over body weight. Compared with Vietnamese women, white women had much more FM (24.8 +/- 8.1 kg vs. 18.8 +/- 4.9 kg; P < 0.0001) and greater PBF (36.4 +/- 6.5% vs. 35.0 +/- 6.2%; P = 0.012). However, there was no significant difference in PBF between the two groups after matching for BMI (35.1 +/- 6.2% vs. 35.0 +/- 5.7%; P = 0.87) or for age and BMI (35.6 +/- 5.1% vs. 35.8 +/- 5.9%; P = 0.79). Using the criteria of BMI = 30, 19% of US white women and 5% of Vietnamese women were classified as obese. Approximately 54% of US white women and 53% of Vietnamese women had their PBF >35% (P = 0.80). Although white women had greater BMI, body weight, and FM than Vietnamese women, their PBF was virtually identical. Further research is required to derive a more appropriate BMI threshold for defining obesity for Asian women.