Gamble Heather L, Parra Gilbert R, Beech Bettina M
Department of Psychology, The University of Memphis, TN 38152, United States.
Eat Behav. 2009 Dec;10(4):232-6. doi: 10.1016/j.eatbeh.2009.07.005. Epub 2009 Jul 16.
The purpose of this study was to examine possible moderators of the relation between physical activity and obesity in adolescence. Adolescents (N=168; mean age=15.20 years; 52.4% girls; 76.8% African American) were recruited from low-income primary care medical facilities in a large southern city. Measures included Body Mass Index (BMI) percentile, physical activity, shared family physical activity, and self-efficacy for healthful eating. Multiple regression analyses were conducted to investigate a) independent contributions of physical activity, shared family activity, and self-efficacy for healthful eating to the prediction of adolescent BMI percentile; b) interactions between shared and individual physical activity in the prediction of BMI percentile; c) interactions between self-efficacy for healthful eating and physical activity in the prediction of BMI percentile; and d) interactions among all three variables. Findings revealed self-efficacy for healthful eating was a significant moderator of the adolescent physical activity and BMI percentile relation. Conclusions emphasize the interactive nature among obesity risk factors.
本研究的目的是探讨青少年身体活动与肥胖之间关系的可能调节因素。从一个南方大城市的低收入初级保健医疗机构招募了青少年（N = 168；平均年龄 = 15.20岁；52.4%为女孩；76.8%为非裔美国人）。测量指标包括体重指数（BMI）百分位数、身体活动、家庭共同身体活动以及健康饮食的自我效能感。进行了多元回归分析，以研究：a）身体活动、家庭共同活动以及健康饮食的自我效能感对青少年BMI百分位数预测的独立贡献；b）在BMI百分位数预测中家庭共同身体活动与个体身体活动之间的相互作用；c）在BMI百分位数预测中健康饮食的自我效能感与身体活动之间的相互作用；d）所有三个变量之间的相互作用。研究结果显示，健康饮食的自我效能感是青少年身体活动与BMI百分位数关系的一个重要调节因素。结论强调了肥胖风险因素之间的相互作用性质。
