Hedwig Lee is with the Department of Sociology, University of Washington, Seattle. Megan Andrew is with the Department of Sociology, University of Notre Dame, Notre Dame, IN. Achamyeleh Gebremariam is with the Child Health Evaluation and Research Unit, Julie C. Lumeng is with the Center for Human Growth and Development, and Joyce M. Lee is with the Child Health Evaluation and Research Unit, Pediatric Endocrinology, University of Michigan, Ann Arbor.
Am J Public Health. 2014 May;104(5):e70-6. doi: 10.2105/AJPH.2013.301806. Epub 2014 Mar 13.
We examined the relationship between timing of poverty and risk of first-incidence obesity from ages 3 to 15.5 years.
We used the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development (1991-2007) to study 1150 children with repeated measures of income, weight, and height from birth to 15.5 years in 10 US cities. Our dependent variable was the first incidence of obesity (body mass index ≥ 95th percentile). We measured poverty (income-to-needs ratio < 2) prior to age 2 years and a lagged, time-varying measure of poverty between ages 2 and 12 years. We estimated discrete-time hazard models of the relative risk of first transition to obesity.
Poverty prior to age 2 years was associated with risk of obesity by age 15.5 years in fully adjusted models. These associations did not vary by gender.
Our findings suggest that there are enduring associations between early life poverty and adolescent obesity. This stage in the life course may serve as a critical period for both poverty and obesity prevention.
我们研究了从 3 岁到 15.5 岁期间贫困发生时间与首次肥胖风险之间的关系。
我们使用美国国立儿童健康与人类发展研究所的儿童早期照料与发展研究（1991-2007 年），对来自 10 个美国城市的 1150 名儿童进行了研究，这些儿童从出生到 15.5 岁期间有反复的收入、体重和身高测量数据。我们的因变量是首次肥胖（体重指数≥第 95 百分位数）的发生情况。我们在 2 岁之前测量贫困情况（收入与需求比<2），并在 2 至 12 岁期间测量滞后、时变的贫困情况。我们使用离散时间风险模型估计了首次向肥胖转变的相对风险。
在充分调整的模型中，2 岁之前的贫困与 15.5 岁时肥胖的风险相关。这些关联在性别之间没有差异。
我们的研究结果表明，早期生活贫困与青少年肥胖之间存在持久的关联。生命历程的这一阶段可能是贫困和肥胖预防的关键时期。
