Peer-enhanced Intervention to Support Teen Weight Loss
| Status: | Completed |
|---|---|
| Conditions: | Obesity Weight Loss |
| Therapuetic Areas: | Endocrinology |
| Healthy: | No |
| Age Range: | 13 - 16 |
| Updated: | 10/8/2017 |
| Start Date: | August 2003 |
| End Date: | May 2007 |
Peer-Enhanced Intervention to Support Teen Weight Loss
The purpose of this study is to determine whether adding a peer-based intervention based on
an outward bound model is more effective than a standard behavioral weight intervention for
helping adolescents lose weight.
an outward bound model is more effective than a standard behavioral weight intervention for
helping adolescents lose weight.
The prevalence of overweight in children and adolescents has increased significantly during
the last two decades. While there are empirically supported weight management interventions
for school age children, treatment findings with overweight adolescents are not as
consistent. A potential limitation of weight control interventions for adolescents is the
minimal attention given to the peer group as an active component of treatment. We have
promising findings from a pilot study that involves adding an innovative peer-based
intervention (peer-based skills training; PBST) to cognitive- behavioral weight management
treatment for adolescents. The purpose of the proposed study is to expand the pilot by: 1)
increasing our sample size, 2) assessing weight loss over a longer time period, and 3)
evaluating the role of psychosocial variables, as well as physical activity and diet, in
mediating treatment outcome. It is hypothesized that overweight adolescents randomized to
cognitive-behavioral treatment with peer enhancement will demonstrate greater weight loss at
long term follow-up than adolescents randomized to cognitive-behavioral treatment with
exercise.
One hundred and fifty adolescents between the ages of 13 and 16 years and 20% and 90%
overweight will be randomized to one of two treatment conditions: 1) Cognitive-Behavioral
Weight Loss Treatment with Peer-Based Skills Training (CBT+PBST) or 2) Cognitive-Behavioral
Weight Loss Treatment with Exercise (CBT+EXER). Measures of height, weight, physical
activity, diet, and psychosocial functioning will be obtained at baseline, end of treatment,
12 months, and 24 months after randomization. A between-groups t-test will be conducted to
evaluate group differences in change in percent overweight between baseline and 24-month
follow-up. Hierarchical linear modeling will be used to assess the pattern of weight loss for
the two treatment groups across four time points: baseline, end of treatment, 12 month, and
24 month follow-up. Effects of treatment on psychosocial measures will be analyzed using
mixed analysis of variance with treatment condition as the between subjects factor and a
within subject factor of time. Finally, a series of regression analyses will be conducted to
evaluate the role of psychosocial variables, physical activity, and diet, as mediators of
treatment outcome.
the last two decades. While there are empirically supported weight management interventions
for school age children, treatment findings with overweight adolescents are not as
consistent. A potential limitation of weight control interventions for adolescents is the
minimal attention given to the peer group as an active component of treatment. We have
promising findings from a pilot study that involves adding an innovative peer-based
intervention (peer-based skills training; PBST) to cognitive- behavioral weight management
treatment for adolescents. The purpose of the proposed study is to expand the pilot by: 1)
increasing our sample size, 2) assessing weight loss over a longer time period, and 3)
evaluating the role of psychosocial variables, as well as physical activity and diet, in
mediating treatment outcome. It is hypothesized that overweight adolescents randomized to
cognitive-behavioral treatment with peer enhancement will demonstrate greater weight loss at
long term follow-up than adolescents randomized to cognitive-behavioral treatment with
exercise.
One hundred and fifty adolescents between the ages of 13 and 16 years and 20% and 90%
overweight will be randomized to one of two treatment conditions: 1) Cognitive-Behavioral
Weight Loss Treatment with Peer-Based Skills Training (CBT+PBST) or 2) Cognitive-Behavioral
Weight Loss Treatment with Exercise (CBT+EXER). Measures of height, weight, physical
activity, diet, and psychosocial functioning will be obtained at baseline, end of treatment,
12 months, and 24 months after randomization. A between-groups t-test will be conducted to
evaluate group differences in change in percent overweight between baseline and 24-month
follow-up. Hierarchical linear modeling will be used to assess the pattern of weight loss for
the two treatment groups across four time points: baseline, end of treatment, 12 month, and
24 month follow-up. Effects of treatment on psychosocial measures will be analyzed using
mixed analysis of variance with treatment condition as the between subjects factor and a
within subject factor of time. Finally, a series of regression analyses will be conducted to
evaluate the role of psychosocial variables, physical activity, and diet, as mediators of
treatment outcome.
Inclusion Criteria:
- Adolescents 13-16 years old
- 20-90% overweight with reference gender and age
- At least 1 parent who can participate
- English speaking
- Agree to study participation and random assignment
- Be available for long-term follow-up
Exclusion Criteria:
- Current involvement in another weight loss program
- Unable to adhere to prescribed dietary plan and physical activity due to medical
condition
- Unable to understand intervention materials
- In treatment for or diagnosed with psychiatric disorder
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