Comparison of a condensed 12-week version and a 24-week version of a family-based pediatric weight management program.

Background: The current study compares the effectiveness of a condensed 12-week version and a 24-week version of the same pediatric behavioral weight management program.

Methods: Children (n=162) between the ages of 8 and 18 years (baseline BMIz=2.39; standard deviation=0.29) were randomized to either a 12- or 24-week version of the same behavioral weight management program. Child anthropometric data were recorded at baseline, 6 weeks, 12 weeks, 24 weeks, and 12 months. A two-level longitudinal model was used to examine within- and between-group differences in BMIz change over time.

Results: A significant group-by-time interaction was found (β=-0.01; standard error, <0.01; p<0.01) with the 24-week group showing greater reductions in BMIz. Children in the 24-week group showed significant BMIz reductions over time (z=-5.18; p<0.01), but children in the 12-week group did not (z=-0.85; p=0.39).

Conclusions: Children in the 24-week program demonstrated greater reductions in BMIz than children in the 12-week group. Therefore, there may be additional benefit to sessions above and beyond the 8- to 12-week minimum suggested for pediatric weight management programs.