Importance of Age for 3-Year Continuous Behavioral Obesity Treatment Success and Dropout Rate
ABSTRACT To assess whether first year weight loss, age, and socioeconomic background correlate with the success rate of continuous long-term behavioral obesity treatment.
In a 3-year longitudinal study, obese children (n = 684) were divided into three groups based on age at the start of treatment, age 6-9 years, 10-13 years, and 14-16 years. RESULTs: The mean BMI standard deviation score (BMI-SDS) decline was age-dependent (p = 0.001), independently of adjustment for missing data: -1.8 BMI-SDS units in the youngest, -1.3 in the middle age group, and -0.5 in the oldest age group. SES and parental BMI status did not affect the results. 30% of the adolescents remained in treatment at year 3. There was only a weak correlation between BMI-SDS change after 1 and 3 years: r = 0.51 (p < 0.001). Among children with no BMI-SDS reduction during year 1 (n = 46), 40% had a clinically significantly reduced BMI-SDS after year 3.
Behavioral treatment should be initiated at an early age to increase the chance for good results. Childhood obesity treatment should be continued for at least 3 years, regardless of the initial change in BMI-SDS.
- SourceAvailable from: Mark J Van Ryzin
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- "From a clinical perspective, our results suggest that family-centered interventions such as the FCU can have a positive impact on family processes, which may in turn impact adolescent health in a manner that is carried forward into adulthood, even if the program does not include components related to nutrition or physical activity. This is especially promising as targeting obesity in adolescents through traditional means (focusing on obesity-related behaviors) continues to produce very modest results (Danielsson et al., 2012). As noted by Gerards and colleagues (2011), few obesity prevention and intervention programs address broader aspects of parenting, and our findings can spur the development of new programs by suggesting specific mechanisms by which the family can influence adolescent and early-adult health. "
ABSTRACT: We explored family processes in adolescence that may influence the likelihood of obesity in early adulthood using a randomized trial of a family-based intervention (the Family Check-Up, or FCU). The FCU has been shown to reduce escalations in antisocial behavior and depression in adolescence by supporting positive family management practices, but no research has examined the mechanisms by which the FCU could influence health-related attitudes and behaviors linked to obesity. Participants were 998 adolescents (n = 526 male; n = 423 European American; M age 12.21 years) and their families, recruited in 6th grade from 3 middle schools in the Pacific Northwest. We used structural equation modeling (SEM) and an Intent-To-Treat (ITT) design to evaluate the direct and indirect effects of the FCU on parent-youth relationship quality (ages 12-15), healthy lifestyle behaviors, eating attitudes, depressive symptoms (all measured at age 17), and obesity (age 22). We found that the FCU led to greater parent-youth relationship quality, which predicted enhanced health-related behaviors, reduced maladaptive eating attitudes, and reduced depression. In turn, reduced maladaptive eating attitudes predicted reduced odds of obesity. The indirect effect of the FCU on obesity by way of parent-youth relationship quality and eating attitudes was significant. Our findings illustrate how family processes may influence adolescent health and suggest that family functioning may be an additional factor to consider when developing intervention programs for obesity. (PsycINFO Database Record (c) 2013 APA, all rights reserved).Journal of Family Psychology 02/2013; 27(1):106-16. DOI:10.1037/a0031428 · 1.89 Impact Factor
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ABSTRACT: The prevalence of obesity among adolescents has increased and we lack effective treatments.International Journal of Obesity 09/2012; 2012Nov;36(11)(11):1388-95. DOI:10.1038/ijo.2012.160 · 5.39 Impact Factor
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ABSTRACT: OBJECTIVES To investigate whether the degree of obesity predicts the efficacy of long-term behavioral treatment and to explore any interaction with age. DESIGN A 3-year longitudinal observational study. Obese children were divided into 3 age groups (6-9, 10-13, and 14-16 years) and also into 2 groups (moderately obese, with a body mass index [BMI]-standard deviation [SD] score [or z score] of 1.6 to <3.5, and severely obese, with a BMI-SD score of ≥3.5). SETTING National Childhood Obesity Center, Stockholm, Sweden. PARTICIPANTS Children 6 to 16 years of age who started treatment between 1998 and 2006. INTERVENTION Behavioral treatment of obesity. MAIN OUTCOME MEASURE Change in BMI-SD score during 3 years of treatment; a reduction in BMI-SD score of 0.5 units or more was defined as clinically significant. RESULTS A total of 643 children (49% female children) met the inclusion criteria. Among the youngest moderately obese children, 44% had a clinically significant reduction in BMI-SD score (mean reduction, -0.4 [95% CI, -0.55 to -0.32]). Treatment was less effective for the older moderately obese children. Twenty percent of children who were 10 to 13 years of age and 8% of children who were 14 to 16 years of age had a reduction in BMI-SD score of 0.5 units or more; 58% of the severely obese young children showed a clinically significant reduction in BMI-SD score (mean reduction, -0.7 [95% CI, -0.80 to -0.54]). The severely obese adolescents showed no change in mean BMI-SD score after 3 years, and 2% experienced clinically significant weight loss. Age was found to be a predictor of a reduction in BMI-SD score (odds ratio, 0.68 units per year [95% CI, 0.60-0.77 units per year]). CONCLUSIONS Behavioral treatment was successful for severely obese children but had almost no effect on severely obese adolescents.JAMA Pediatrics 10/2012; 166(12):1-6. DOI:10.1001/2013.jamapediatrics.319 · 4.25 Impact Factor