Os fatores sociodemográficos moderam a associação da prática de atividade física dos pais e amigos com o nível de atividade física dos adolescentes?

Abstract

The objective of this study was to analyze if the sociodemographic factors moderate the association of physical activity practice of parents and friends, and the level of physical activity among adolescents. It was an cross sectional epidemiological study with 2,859 adolescents (57.8% female) 14-19 years old of the city of João Pessoa, Paraíba. The level of physical activity among adolescents and the physical activity of parents and friends were measured by questionnaires. The prevalence of physically active adolescents was 50.2% (95%CI: 47.3-53.1), being higher in males (66.3%; 95%CI: 63.7-69.0) compared to female (38.4%; 95%CI: 36.1-40.8). The results of binary logistic regression analysis showed that there is an association between physical activity of parents and friends and the level of physical activity among adolescents (p < 0.001). However, this association is moderated by sociodemographic factors (sex and economic class). The magnitude of the measure of the association between the practice of physical activity of friends and adolescents was higher in male (OR = 5.02; 95%CI: 2.73-9.26 vs. female OR = 2.21; 95%CI: 1.55-3.14) and A/B economic class adolescents (OR = 3.90; 95%CI: 2.39-6.39 vs. class C/D/E: OR = 2.27; 95%CI: 1.53-3.37). The physical activity of the mother was associated significantly and positively with the level of physical activity in adolescents of A/B economic class (OR = 1.87; 95%CI: 1.32-2.62). We conclude that sociodemographic factors moderate the association of physical activity from friends and from the mother with the level of adolescents physical activity. The magnitude of the association between these variables varied with sex and economic class of adolescents.