Decrease in Television Viewing Predicts Lower Body Mass Index at 1-Year Follow-Up in Adolescents, but Not Adults

作者：French Simone A^*; Mitchell Nathan R; Hannan Peter J

来源：Journal of Nutrition Education and Behavior, 2012, 44(5): 415-422.

DOI：10.1016/j.jneb.2011.12.008

• television
• weight gain
• sugar-sweetened beverages
• physical activity

Objective: To examine associations between television viewing, sugar-sweetened beverage consumption, eating out, physical activity, and body weight change over 1 year.
Design: Secondary data analysis from randomized intervention trial.
Setting: Households in the community.
Participants: Adults (n = 153) and adolescents (n = 72) from the same households.
Intervention: Households were randomized to a home-based obesity prevention intervention or to a no-intervention control group for a 1-year period.
Main Outcome Measures: Self-reported television viewing (TV) hours, diet, and physical activity. Body mass index (BMI) computed from measured weight and height (primary outcome measure).
Analysis: Mixed-model regression.
Results: Among adolescents, a significant prospective association was observed between decreases in television viewing hours and lower BMI z score at 1-year follow-up (decreased TV hours: BMI z score mean = 0.65; no change or increase TV hours: BMI z score 0.92; P < .02). No significant prospective associations were observed among adults.
Conclusions and Implications: Reducing television viewing may be an effective strategy to prevent excess weight gain among adolescents.

• 出版日期2012-10