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



      To examine associations between television viewing, sugar-sweetened beverage consumption, eating out, physical activity, and body weight change over 1 year.


      Secondary data analysis from randomized intervention trial.


      Households in the community.


      Adults (n = 153) and adolescents (n = 72) from the same households.


      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).


      Mixed-model regression.


      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.

      Key Words

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