Mediators of Weight Loss in a Family-Based Intervention Presented over the Internet

Louisiana State University, Baton Rouge, Louisiana, United States
Obesity research (Impact Factor: 4.95). 08/2004; 12(7):1050-9. DOI: 10.1038/oby.2004.132
Source: PubMed


To assess the process variables involved in a weight loss program for African-American adolescent girls. Several process variables have been identified as affecting success in in vivo weight loss programs for adults and children, including program adherence, self-efficacy, and social support. The current study sought to broaden the understanding of these process variables as they pertain to an intervention program that is presented using the Internet. It was hypothesized that variables such as program adherence, dietary self-efficacy, psychological factors, and family environment factors would mediate the effect of the experimental condition on weight loss.
Participants were 57 adolescent African-American girls who joined the program with one obese parent; family pairs were randomized to either a behavioral or control condition in an Internet-based weight loss program. Outcome data (weight loss) are reported for the first 6 months of the intervention.
Results partially supported the hypotheses. For weight loss among adolescents, parent variables pertaining to life and family satisfaction were the strongest mediating variables. For parental weight loss, changes in dietary practices over the course of 6 months were the strongest mediators.
The identification of factors that enhance or impede weight loss for adolescents is an important step in improving weight loss programs for this group. The current findings suggest that family/parental variables exert a strong influence on weight loss efforts for adolescents and should be considered in developing future programs.

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    • "This research provides important evidence that web-based programs may lead to improved health behaviors among adolescents, including underserved adolescents. However, to date, few previous randomized controlled trials have been conducted to test the efficacy of on-line web-based interventions on reducing obesity in overweight African American adolescent and their parents [54]. A preliminary study by our group that evaluated a similar on-line web-based program was rated as well-liked and easy to use by African American parents [55]. "
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    • "Although the field of obesity research has traditionally focused on parenting behaviors related to physical activity and nutrition (Davison & Birch, 2001), Rhee et al. (2006) noted that a warm and supportive parenting style may have a greater impact on childhood and adolescent obesity. Indeed, variables related to family functioning (e.g., parental acceptance and support) have been linked to successful treatment outcomes in clinical studies (Stein, Epstein, Raynor, Kilanowksi, & Paluch, 2005; White et al., 2004). Likewise, epidemiological research has found that family factors, such as parent–youth relationship quality, are important to controlling adolescent weight (Mellin, Neumark-Sztainer, Story, Ireland, & Resnick, 2002). "
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