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Updated: Oct 11, 2025

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Quality of life and adiposity in adolescents: direct and indirect effects
Isabelle Arruda Barbosa1, Marise Fagundes Silveira2, Adélia Dayane Guimarães Fonseca3
1Instituto Federal do Norte de Minas Gerais. Rodovia BR 367, km 07, s/n, Zona Rural. 39900-000 Almenara MG Brasil. isabelleab3@gmail.com.
Abstract:
This paper aimed to analyze the direct and indirect effects of adiposity and factors related to adolescents' quality of life. This is a cross-sectional study with 635 adolescents (10-16 years) from public schools in Montes Claros-MG, Brazil. Anthropometric data, physical activity (PA), inadequate dietary habits, body image, and quality of life (QoL) of adolescents were collected. A structural equation modeling was performed. The variables addressed as constructs were adiposity and inadequate dietary habits, the exploratory variables were PA and body image, and the outcome variable was QoL. The total effect of PA-mediated adiposity on QoL was positive and significant (β=0.213; p<0.05), in contrast to the total effect mediated by inadequate dietary habits on QoL, which was negative and significant (β=-0.150; p<0.05). The direct effect of PA on QoL was positive and significant (β=0.209; p<0.001). No body image-related effects were observed. The effects of adiposity on adolescents' QoL tend to improve when mediated by PA, and they worsen when mediated by inadequate dietary habits. The effects of PA tend to improve the QoL of adolescents.
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