Birnbaum Amanda S, Lytle Leslie A, Story Mary, Perry Cheryl L, Murray David M
Division of Epidemiology, University of Minnesota, Minneapolis 55454, USA.
Health Educ Behav. 2002 Aug;29(4):427-43. doi: 10.1177/109019810202900404.
Multicomponent interventions are recommended for health behavior change among adolescents. However, it is difficult to disentangle the effects of multiple intervention components. This article reports outcomes associated with varying levels of exposure to a school-based nutrition intervention. Teens Eating for Energy and Nutrition at School (TEENS). Four incremental exposures were possible: (1) control group, (2) school environment interventions only, (3) classroom plus environment interventions, and (4) peer leaders plus classroom plus environment interventions. Pattems suggesting dose response were observed, with peer leaders reporting the largest increases in fruit, vegetable, and lower fat food consumption. Students exposed to classroom plus environment interventions also improved, whereas students exposed only to school environment interventions showed trends toward choosing lower fat foods and declining fruit intake and no change in vegetable intake. Control students' choices remained stable. Future studies may investigate mechanisms for peer leaders' changes, maximizing curriculum effectiveness, and improving environmental interventions.
多成分干预措施被推荐用于促进青少年健康行为的改变。然而，很难区分多种干预成分的效果。本文报告了与不同程度接触基于学校的营养干预措施相关的结果。即“学校青少年能量与营养饮食”（TEENS）项目。有四种递增接触方式：（1）对照组；（2）仅学校环境干预；（3）课堂加环境干预；（4）同伴领袖加课堂加环境干预。观察到了显示剂量反应关系的模式，同伴领袖报告水果、蔬菜和低脂食品的摄入量增加最多。接受课堂加环境干预的学生也有改善，而仅接受学校环境干预的学生显示出选择低脂食品的趋势以及水果摄入量下降，蔬菜摄入量没有变化。对照组学生的选择保持稳定。未来的研究可以调查同伴领袖产生变化的机制、使课程效果最大化以及改善环境干预措施。
