Independent and combined effects of lifestyle behaviors on adolescent health-related quality of life.

OBJECTIVE: To investigate the independent and combined effects of lifestyle behaviors, including physical activity, sedentary behavior, sleep duration and food intake, in the health-related quality of life (HRQoL) of Brazilian adolescents. METHODS: Cross-sectional school-based study, with the participation of 306 adolescents aged 14 to 18 years. A questionnaire was applied with structured questions to collect lifestyle behaviors data. Perception of the HRQoL was identified using the Kidscreen-27. The study used covariance analysis and linear regression models for statistical analysis. RESULTS: Adolescents who reported ≤ 2 hours/day of screen-based sedentary behavior and sleep duration equivalent to 8-10 hours/night presented significantly higher HRQoL. Adolescents who reported joint adherence ≥ 3 healthy lifestyle behaviors demonstrated approximately two [OR=2.12] to three times [OR=3.04] more chance of presenting higher perceptions of HRQoL. CONCLUSION: Although healthy lifestyle behaviors had a positive independent effect on HRQoL, joint adherence to healthy behaviors enhances the cumulative effect.

Health-promoting domains and lifestyle of a sample of Brazilian adolescents.

BACKGROUND: Reports indicate that the health habits of adults are strongly linked to the behaviors incorporated in adolescence. Therefore, it is essential to monitor the lifestyle of adolescents to promote their present and future health. This study aimed to identify differences in health-promoting domains according to demographic data and lifestyle behaviors, including physical activity, sedentary behavior, sleep duration, and food intake, in a sample of Brazilian adolescents. MATERIALS AND METHODS: Cross-sectional school-based study, with the participation of 306 adolescents aged 14 to 18 years. A questionnaire was applied with structured questions to collect demographic data and lifestyle behaviors. To examine the health-promoting domains the Adolescent Health Promotion Scale (AHPS) was used. Data were analyzed using multivariate analysis. RESULTS: Scores attributed to each of the health-promoting domains showed substantial variations according to sex, age, year of study, parents' schooling, and family economic class. After adjustment for covariables, the adolescent who presented significantly higher scores equivalent to the overall index of health promotion reported being more physically active (F = 4.848; P = 0.009), sleeping 6-8 hours/night (F = 2.328; P = 0.046), consuming fruit/vegetable more frequently (F = 3.168; P = 0.024), while sedentary behavior and intake of sweetened products/soft drinks have not shown any significant effect. CONCLUSION: The findings confirmed the consistent positive influence of health-promoting domains assessed by AHPS on healthy lifestyle behaviors, suggesting in the intervention programs aimed at adopting healthy lifestyle approaches it is important enough to contemplate actions aimed at all the areas of health promotion with characteristics aimed at nutrition behavior, social support, health responsibility, life appreciation, exercise behavior, and stress management.

Independent and combined effects of lifestyle behaviors on adolescent health-related quality of life / Efectos individuales y combinados de conductas del estilo de vida en la calidad de vida relacionada a la salud de adolescentes / Efeitos individual e combinado de condutas do estilo de vida na qualidade de vida relacionada à saúde de adolescentes

ABSTRACT Objective: To investigate the independent and combined effects of lifestyle behaviors, including physical activity, sedentary behavior, sleep duration and food intake, in the health-related quality of life (HRQoL) of Brazilian adolescents. Methods: Cross-sectional school-based study, with the participation of 306 adolescents aged 14 to 18 years. A questionnaire was applied with structured questions to collect lifestyle behaviors data. Perception of the HRQoL was identified using the Kidscreen-27. The study used covariance analysis and linear regression models for statistical analysis. Results: Adolescents who reported ≤ 2 hours/day of screen-based sedentary behavior and sleep duration equivalent to 8-10 hours/night presented significantly higher HRQoL. Adolescents who reported joint adherence ≥ 3 healthy lifestyle behaviors demonstrated approximately two [OR=2.12] to three times [OR=3.04] more chance of presenting higher perceptions of HRQoL. Conclusion: Although healthy lifestyle behaviors had a positive independent effect on HRQoL, joint adherence to healthy behaviors enhances the cumulative effect.

RESUMEN Objetivo: Investigar los efectos individuales y combinados de conductas del estilo de vida, incluyendo actividad física, conducta sedentaria, sueño y ingestión de alimentos, en la calidad de vida relacionada a la salud (CVRS) de adolescentes brasileños. Métodos: Estudio observacional de base escolar, con participación de 306 adolescentes de 14 a 18 años. Fue aplicada encuesta con cuestiones estructuradas para recoger datos de conductas del estilo de vida. Percepción de la CVRS fue identificada por medio del Kidscreen-27. Análisis de covarianza y modelos de regresión linear fueron usados para análisis estadístico. Resultados: Adolescentes que apuntaron ≤ 2 horas/día de conducta sedentaria basado en pantalla y duración de sueño entre 8-10 horas/noche tuvieron CVRS significativamente más elevada. Adolescentes que relataron adherencia conjunta ≥ 3 conductas saludables del estilo de vida demostraron aproximadamente de dos [OR=2,12] a tres veces [OR=3,04] más chance de presentar percepciones más elevadas de CVRS. Conclusión: Aunque conductas saludables del estilo de vida resulten en efecto individual positivo sobre la CVRS, adherencia conjunta de conductas saludables potencializa el efecto acumulativo.

RESUMO Objetivo: Investigar os efeitos individual e combinado de condutas do estilo de vida, incluindo atividade física, comportamento sedentário, sono e consumo alimentar, na qualidade de vida relacionada à saúde (QVRS) de adolescentes brasileiros. Métodos: Estudo observacional de base escolar, com participação de 306 adolescentes de 14 a 18 anos. Foi aplicado questionário com questões estruturadas para levantar dados de condutas do estilo de vida. Percepção da QVRS foi identificada por meio do Kidscreen-27. Análise de covariância e modelos de regressão linear foram usados para análise estatística. Resultados: Adolescentes que apontaram ≤ 2 horas/dia de comportamento sedentário baseado em tela e duração de sono entre 8-10 horas/noite apresentaram QVRS significativamente mais elevada. Adolescentes que relataram adesão conjunta ≥ 3 condutas saudáveis do estilo de vida demonstraram aproximadamente de duas [OR=2,12] a três vezes [OR=3,04] mais chance de apresentarem percepções mais elevadas de QVRS. Conclusão: Embora condutas saudáveis do estilo de vida apresentaram efeito individual positivo sobre a QVRS, adesão conjunta de condutas saudáveis potencializaram o efeito cumulativo.