Sedentary behavior and physical activity are independently associated with obesity in Brazilian adolescents: a quantile regression analysis

COMPORTAMENTO SEDENTÁRIO E ATIVIDADE FÍSICA SÃO INDEPENDENTEMENTE ASSOCIADOS À OBESIDADE EM JOVENS BRASILEIROS: UMA ANÁLISE DE REGRESSÃO QUANTÍLICA

Autores/as

DOI:

https://doi.org/10.21527/2176-7114.2021.44.10337

Palabras clave:

Sedentary Lifestyle, Motor Activity, Nutritional Status, Cross-Sectional Studies

Resumen

Objective: to test the association of SB and moderate to vigorous physical activity (MVPA) with body mass index (BMI) in a representative sample of Brazilian young people. Methods: This is a cross-sectional school-based study (n = 1,023), including adolescents (14-21y; 54% female) from public and private schools in a Brazilian city. The survey was conducted in 2015 and the adolescents self-reported SB (screen time) and MVPA. Height and body mass were measured to calculate BMI. Quantile regression was used to investigate the association between SB, MVPA and BMI distribution percentiles (P10 ..., P90; statistical significance p <.01). Results: SB and MVPA were associated with higher and lower BMI values, respectively. Quantile regression revealed that the associations were nonlinear and stronger in the upper BMI percentiles. Also, in the adjusted models (SB and MVPA in the same model), the associations were enhanced for MVPA. For example, each additional hour of MVPA at P10 was associated with −0.05 (p <.01) lower BMI value, against −0.09 at P50 (p <.01) and even lower at P90, −0.24 (p <.01). Conclusion: SB and MVPA were independently and nonlinearly associated with BMI in our sample of Brazilian youth. The associations were more notable in the higher percentiles of the BMI distribution. Our findings suggest that nonlinearity between exposures and outcome should be considered when proposing future strategies for pediatric obesity prevention.

Publicado

2022-02-18

Cómo citar

Lourenço, C. L. M., & Mendes, E. L. (2022). Sedentary behavior and physical activity are independently associated with obesity in Brazilian adolescents: a quantile regression analysis: COMPORTAMENTO SEDENTÁRIO E ATIVIDADE FÍSICA SÃO INDEPENDENTEMENTE ASSOCIADOS À OBESIDADE EM JOVENS BRASILEIROS: UMA ANÁLISE DE REGRESSÃO QUANTÍLICA. Revista Contexto &Amp; Saúde, 21(44), 265–278. https://doi.org/10.21527/2176-7114.2021.44.10337

Número

Sección

Exercício Físico & Saúde