National School Lunch Program Participation and Sex Differences in Body Mass Index Trajectories of Children From Low-Income Families
National School Lunch Program Participation and Sex Differences in Body Mass Index Trajectories of Children From Low-Income Families
复制标题
DOI：
10.1001/archpediatrics.2010.253
复制
发表时间：
2011-04-01
影响因子：
--
通讯作者：
Doyle, Emily A.
中科院分区：
文献类型：
--
作者：
Hernandez, Daphne C.;Francis, Lori A.;Doyle, Emily A.
目的：调查从幼儿园到五年级的低收入儿童参与国家学校午餐计划（NSLP）的模式，并研究参与影响到八年级体重指数（BMI）轨迹的性别差异的方式。设计：纵向，二级数据分析。设置：1998年进入幼儿园的低收入美国儿童样本。参与者：来自低收入家庭的女孩（n = 574）和男孩（n = 566），他们参加了幼儿园队列的早期儿童纵向研究。主要暴露：参与NSLP。主要结果测量：NSLP参与的临时和持续模式，以及在5个数据点计算的年龄特异性和性别特异性BMI原始评分。结果：在参加NSLP的学校就读的低收入儿童中，持续参加该方案的儿童和临时参加该方案的儿童都表现出类似的社会经济不利因素。非线性混合模型表明，低收入参与女孩的BMI变化率（即增加）大于低收入未参与女孩;然而，低收入参与女孩和未参与女孩的平均BMI没有显著差异。在低收入的boys.Conclusions：结果表明，参与NSLP与低收入女孩的体重快速增加，但不是低收入的男孩。
Objectives: To investigate participation patterns in the National School Lunch Program (NSLP) among low-income children from kindergarten to fifth grade and to examine the ways in which participation influences sex differences in the trajectories of body mass index (BMI) through the eighth grade.Design: Longitudinal, secondary data analysis.Setting: Sample of low-income US children who entered kindergarten in 1998.Participants: Girls (n = 574) and boys (n = 566) from low-income families who participated in the Early Childhood Longitudinal Study, Kindergarten Cohort.Main Exposure: Participation in the NSLP.Main Outcome Measures: Temporary and persistent patterns of NSLP participation, and age-specific and sex-specific BMI raw scores calculated at 5 data points.Results: Among the low-income children who attended schools that participated in the NSLP, both the children who persistently participated in the program and those who temporarily participated in the program displayed similar socioeconomically disadvantaged factors. Nonlinear mixed models indicated a larger rate of change in BMI (ie, an increase) among low-income, participating girls than among low-income, nonparticipating girls; however, mean BMIs did not significantly differ between low-income girls who participated and those who did not participate. No significant differences were observed among low-income boys.Conclusions: Results suggest that participation in the NSLP is associated with rapid weight gain for low-income girls but not for low-income boys.