Longitudinal changes in BMI and in an index estimating excess lipids among white and black adults in the United States
Longitudinal changes in BMI and in an index estimating excess lipids among white and black adults in the United States
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DOI：
10.1038/sj.ijo.0803697
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发表时间：
2008-01-01
影响因子：
4.9
通讯作者：
Cheng, Y. J.
中科院分区：
文献类型：
--
作者：
Kahn, H. S.;Cheng, Y. J.
背景资料：成人肥胖症的流行受个体体重增加或减少的影响，但很少有研究测量大人群中个体体重的变化。体重的变化可能与脂质累积乘积（Lipid accumulation product，简称BMI）的变化不一致，BMI是一个由腰围和甘油三酯浓度得出的连续指数，用于估计过量脂质。设计和测量：美国研究纵向变化的描述性报告，包括体重指数（BMI，kg/m2）和BMI。受试者：1989年至1996年，在三个观察队列中，共研究了16763名白色和黑人成年人（年轻人冠状动脉风险发展，社区动脉粥样硬化风险研究和心血管健康研究）。BMI的个体年平均变化在年轻人中为正，但在老年时平均变化减少（线性趋势P < 0.001），在73-83岁后变为负。这些平均值，BMI的个体变化，具体到性别和年龄，大约是0.1 U/年以上，从以前的报告，代表性，纵向测量收集在美国1971年和1984年之间。平均而言，个人的年变化在中年前强烈积极。男性的年变化率随年龄的增长而降低（P线性趋势< 0.05）。对于女性，在年龄较大时（白色女性，P < 0.001）或保持不变（黑人女性，P > 0.3）。随着年龄的增长，有一个更大的比例的人，其积极的BMI变化是伴随着同时BMI的变化是负或zero.Conclusions：这些纵向观察在1989-1996年期间提出更大的年度变化BMI相比，在1971-1984年期间研究的成人队列。据估计，所有年龄段的成年人都倾向于积累过量的脂质，包括他们体重减轻的情况。
Background: Adult obesity prevalence is influenced by rates of weight gain or loss among individual persons, but few studies have measured individual weight change in large populations. Changes in weight may not coincide with changes in the lipid accumulation product (LAP), a continuous index derived from waist circumference and triglycerides concentration for estimating excess lipids.Design and measurements: Descriptive report of longitudinal changes from US studies that included body mass index (BMI, kg/m(2)) and LAP.Subjects: A total of 16 763 white and black adults studied between 1989 and 1996 in three observational cohorts (Coronary Artery Risk Development in Young Adults, Atherosclerosis Risk in Communities Study and Cardiovascular Health Study).Results: The means of individual annual changes in BMI were positive for young adults, but the mean changes were reduced at older ages (P for linear trend < 0.001), becoming negative after 73-83 years old. These mean, individual changes in BMI, specific to sex and age, were approximately 0.1 U/year greater than those reported from previous, representative, longitudinal measurements collected in the United States between 1971 and 1984. Mean, individual annual changes in LAP were strongly positive before middle age. For men, the annual LAP changes were reduced at older ages (P linear trend < 0.05). For women, they were greater at older ages (white women, P < 0.001) or remained unchanged (black women, P > 0.3). With increasing age, there was a greater proportion of persons whose positive LAP change was accompanied by simultaneous BMI change that was negative or zero.Conclusions: These longitudinal observations made during 1989-1996 suggest greater annual changes in BMI compared to an adult cohort studied during 1971-1984. As estimated by LAP, adults of all ages tended to accumulate excess lipids, including circumstances in which they lost weight.