Division of Preventive & Behavioral Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA.
J Sch Health. 2013 Jan;83(1):14-20. doi: 10.1111/j.1746-1561.2012.00742.x.
Dietary and physical activity (PA) behaviors can predict disordered weight control behaviors (DWCB) among youth. This study examines dietary and PA correlates of DWCB and differences by race/ethnicity and weight status in a diverse sample of youth.
Self-reported data on dietary weight management behaviors, strengthening/toning exercises, moderate-to-vigorous physical activity, and DWCB (vomiting, taking laxatives, and/or taking diet pills without a prescription) were obtained from 15,260 sixth to eighth graders in 47 middle schools participating in the Massachusetts Healthy Choices Study at baseline (2005). Generalized estimating equations were used to estimate odds of DWCB associated with dietary and PA behaviors and to examine for differences by race/ethnicity and weight status, adjusting for covariates and clustering of individuals within schools.
Disordered weight control behaviors were reported by 3.6% of girls and 3.1% of boys. Youth who engaged in strengthening/toning exercises 7 days per week versus 0-3 days per week had increased odds of DWCB (girls odds ratio [OR] = 1.9; 95% confidence interval [CI] = 1.3 - 3.0; boys OR = 1.5; 95% CI = 1.0 - 2.2). Dietary weight management behaviors were associated with increased odds of DWCB (girls OR = 1.2; 95% CI = 1.1 - 1.3; boys OR = 1.3; 95% CI = 1.2 - 1.4) for each additional behavior. These associations did not differ by race/ethnicity or weight status.
Persons promoting healthy dietary and PA behaviors among youth should consider the co-occurrence of strengthening/toning and dietary weight management behaviors with DWCB and the consistency in these associations across racial/ethnic and weight status groups.
饮食和身体活动（PA）行为可以预测年轻人的饮食失调控制行为（DWCB）。本研究在一个多样化的青少年样本中，考察了 DWCB 的饮食和 PA 相关性以及种族/民族和体重状况的差异。
在参与马萨诸塞州健康选择研究的 47 所中学的 15260 名六至八年级学生中，通过自我报告获取了饮食体重管理行为、强化/塑形运动、中等到剧烈体力活动以及 DWCB（呕吐、服用泻药和/或未经处方服用减肥药）的数据。使用广义估计方程来估计与饮食和 PA 行为相关的 DWCB 的可能性，并调整协变量和个体在学校内的聚类，以检查种族/民族和体重状况的差异。
报告有饮食失调控制行为的女生占 3.6%，男生占 3.1%。每周进行 7 天强化/塑形运动的青少年比每周进行 0-3 天强化/塑形运动的青少年，DWCB 的可能性更高（女生的比值比 [OR] = 1.9；95%置信区间 [CI] = 1.3-3.0；男生 OR = 1.5；95% CI = 1.0-2.2）。饮食体重管理行为与 DWCB 的可能性增加相关（女生 OR = 1.2；95% CI = 1.1-1.3；男生 OR = 1.3；95% CI = 1.2-1.4），每增加一种行为，可能性就增加 12%。这些关联在种族/民族或体重状况方面没有差异。
在促进青少年健康饮食和 PA 行为的人中，应该考虑强化/塑形和饮食体重管理行为与 DWCB 的同时发生，以及这些关联在种族/民族和体重状况群体中的一致性。
