Longitudinal Study of Body Mass Index in Asian Men who Immigrate To the Us

移民美国亚裔男性的体质指数的纵向研究

Eva Erber Oakkar ； June Stevens MS ； Patrick T Bradshaw ； Jianwen Cai ； Krista M Perreira ； Barry M Popkin ； Penny Gordon-Larsen ； Deborah R Young ； Nirupa R Ghai ； Bette Caan ； Virginia P Quinn

《Asia Pacific Journal of Clinical Nutrition》 24卷4期 (2015/12) Pp. 701-709

https://doi.org/10.6133/apjcn.2015.24.4.10

摘要

背景与目的：横断面研究表明：适应西方的规范，尤其是在年轻的时候，或许可以解释生活在美国的亚洲人的平均体质指数（BMI）高于生活在亚洲的亚洲人。然而，移民和非移民之间社会文化因素难以测量，因此，需要对同一人群移民前后进行纵向研究。为确定不同年龄BMI因居住地（美国或亚洲）不同变化的差别，采用纵向数据记录移民时的年龄和移民前后的BMI。方法和研究设计：加州男性健康研究包括1549位2002－03调查基线时年龄在44－71岁的亚裔男性。用自己报告的体重历史和当前的身高计算其30、40、50和60岁时的BMI。确定每个年龄段的居住地和移民时的年龄。使用广义估计方程进行数据分析。结果：亚裔男性在移民美国之前，十年BMI增幅小于已经在美国生活的亚裔男性。年龄在30－40岁的人群中这种效果最明显，居住在亚洲的亚洲人群，其十年间BMI增幅比在美国生活的亚裔男性低0.69 kg/m^2（95% CI：-1.08，-0.30）。40岁之前移民到美国其BMI增幅大于年龄较大时移民到美国的人群。结论：本研究是第一个支持生活在美国和年轻时移民导致亚裔男性较大的BMI增长这一假设的研究。

關鍵字

亚洲人 ； 移民 ； 文化适应 ； 体质指数 ； 居住地

並列摘要

Background and Objectives: Cross-sectional studies indicate that adaptation to Western norms, especially at a younger age, might explain the higher average body mass index (BMI) among Asians living in the United States (US) compared to Asians living in Asia. However, migrants differ from non-migrants in sociocultural factors that are difficult to measure and, thus, longitudinal studies on the same individuals prior to and after immigration are needed. The objective of this study was to determine differences in changes in BMI across age by residence (US or Asia) and age at immigration using longitudinal data on BMI prior to and after immigration. Methods and Study Design: The California Men's Health Study includes 1,549 foreign-born Asian men who were aged 44-71 at baseline in 2002-03. BMI at ages 30, 40, 50 and 60 was calculated using self-reported weight history and current height. Residence at each age decade and age at immigration were determined. Data were analyzed using generalized estimating equations. Results: Ten-year BMI increases were smaller among Asians who lived in Asia prior to migrating to the US compared to those who already lived in the US. This effect was most evident between ages 30-40 when Asians in Asia had a 0.69 kg/m^2 (95% CI: -1.08, -0.30) smaller increase in BMI. Immigrants who moved to the US before age 40 experienced greater increases in BMI than immigrants who moved to the US at an older age. Conclusion: This study is the first to support the hypothesis that living in the US and younger age at immigration results in larger BMI increases in Asian men.

並列關鍵字

Asians ； immigration ； acculturation ； body mass index ； residence