Overweight and poor? On the relationship between income and the body mass index
Overweight and poor? On the relationship between income and the body mass index
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DOI：
10.1016/j.ehb.2011.07.004
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发表时间：
2011-12-01
影响因子：
2.5
通讯作者：
Jolliffe, Dean
中科院分区：
文献类型：
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作者：
Jolliffe, Dean
与传统观点相反，NHANES的数据表明，在过去35年的任何时候，穷人的超重状况从未有过统计学意义上的更高流行率。尽管有这些经验证据，但认为穷人在脂肪过度积累方面较不健康的观点仍然存在。本文提供的证据表明，传统智慧反映了收入和身体质量指数之间关系的重要差异。第一个发现是基于对超重的分布敏感的测量，这表明在过去的35年里，穷人的超重严重程度高于非穷人。第二个发现来自新引入的估计量，无条件分位数回归（UQR），它提供了在无条件BMI分布的不同点上BMI的收入梯度的测量。UQR估计表明，收入和BMI之间的关系最强的是在分布的尾部。有一个统计上显着的负收入梯度的体重指数在肥胖的阈值和一些证据的正梯度在体重不足的阈值。这两个UQR估计值都意味着，对于BMI分布尾部的人来说，收入的增加与更健康的BMI值相关。(C)2011 Elsevier B.V.保留所有权利。
Contrary to conventional wisdom, NHANES data indicate that the poor have never had a statistically significant higher prevalence of overweight status at any time in the last 35 years. Despite this empirical evidence, the view that the poor are less healthy in terms of excess accumulation of fat persists. This paper provides evidence that conventional wisdom is reflecting important differences in the relationship between income and the body mass index. The first finding is based on distribution-sensitive measures of overweight which indicates that the severity of overweight has been higher for the poor than the nonpoor throughout the last 35 years. The second finding is from a newly introduced estimator, unconditional quantile regression (UQR), which provides a measure of the income-gradient in BMI at different points on the unconditional BMI distribution. The UQR estimator indicates that the strongest relationship between income and BMI is observed at the tails of the distribution. There is a statistically significant negative income gradient in BMI at the obesity threshold and some evidence of a positive gradient at the underweight threshold. Both of these UQR estimates imply that for those at the tails of the BMI distribution, increases in income are correlated with healthier BMI values. (C) 2011 Elsevier B.V. All rights reserved.