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01-01-2015 | Uitgave 1/2015

Quality of Life Research 1/2015

Influence of specific individual and environmental variables on the relationship between body mass index and health-related quality of life in overweight and obese adolescents

Tijdschrift:
Quality of Life Research > Uitgave 1/2015
Auteurs:
Julia K. Kolodziejczyk, Kyle Gutzmer, Shana M. Wright, Elva M. Arredondo, Linda Hill, Kevin Patrick, Jeannie S. Huang, Michael Gottschalk, Gregory J. Norman

Abstract

Purpose

Overweight and obese adolescents are at risk for low health-related quality of life (HRQOL). We examined the role of individual- and environmental-level variables on the relationship between body mass index (BMI kg/m2) and HRQOL in adolescents.

Methods

Linear regressions were performed to conduct mediation and moderation analyses on the relationship between BMI and HRQOL in overweight and obese adolescents (N = 205). HRQOL was measured by the Pediatric Quality of Life Inventory. Hypothesized mediators included depression, measured by the Center for Epidemiologic Studies Depression Scale; body image, measured by the gender-specific body dissatisfaction subscale of the Eating Disorder Inventory; and self-esteem, measured by the Rosenberg Self-Esteem Scale. Mediation was assessed using Baron and Kenny’s approach and Sobel’s test of indirect effects. Anglo-acculturation, measured by the Short Acculturation Scale for Hispanics-Youth, and environmental perception, measured by parent-proxy report of the Neighborhood Environment Walkability Scale, were hypothesized moderators.

Results

Body image mediated the relationship between BMI and HRQOL (b = −0.34, SE = 0.17, adj R 2 = 0.19, p = .051), and self-esteem was a partial mediator (b = −0.37, SE = 0.17, adj R 2 = 0.24, p = .027). Sobel’s test confirmed these results (p < .05). No significant moderation effects were found.

Conclusions

The finding that individual-level factors, such as body image and self-esteem, influence the relationship between BMI and HRQOL while environmental factors, such as neighborhood environment and acculturation, do not extends previous research. The finding that body image and self-esteem partially mediate this relationship presents new areas to investigate in interventions that address BMI in youth.

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