Department of Health Management and Policy, University of Michigan School of Public Health, Ann Arbor, MI 48109-2029, USA.
J Aging Health. 2011 Apr;23(3):454-80. doi: 10.1177/0898264310385930. Epub 2010 Nov 10.
To depict the trajectory of BMI from middle to late adulthood and to examine social variations in BMI trajectories.
Eight waves (1992-2006) of the Health and Retirement Study involving a nationally representative sample of Americans aged 51 to 61 years at baseline were used. Changes in BMI were analyzed using hierarchical linear modeling with time-constant and time-varying covariates.
BMI increased linearly over time. Compared with Caucasians, African-Americans had higher BMI levels, while Hispanics had similar BMI levels, but lower rates of increase over time. Higher education predicted lower BMI levels and was not associated with the rate of change. Younger age-at-baseline predicted lower BMI level and lower rate of increase. No gender differences were found.
Observed racial/ethnic and educational differences in BMI trajectory from middle to old age inform policies and interventions aimed at modifying health risks and reducing health disparities in old age.
描绘从中年到老年后期 BMI 的变化轨迹，并探讨 BMI 变化轨迹的社会差异。
本研究使用了健康与退休研究（Health and Retirement Study）的 8 个波次（1992 年至 2006 年）的数据，该研究涉及一个具有全国代表性的、基线年龄为 51 至 61 岁的美国人样本。使用分层线性模型，结合时不变和时变协变量，对 BMI 的变化进行了分析。
BMI 随时间呈线性增加。与白种人相比，非裔美国人的 BMI 水平更高，而西班牙裔人的 BMI 水平相似，但随时间的变化率较低。较高的受教育程度预示着较低的 BMI 水平和较低的变化率。年龄较轻预示着较低的 BMI 水平和较低的增长率。未发现性别差异。
从中年到老年后期 BMI 轨迹观察到的种族/民族和教育差异为旨在改变健康风险和减少老年健康差距的政策和干预措施提供了信息。
