ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

Resumo Objetivos: estimar a prevalência de tempo de tela de adolescentes em três diferentes cenários e possíveis associações com sexo, maturação sexual, faixa etária, classe econômica e estado nutricional. Métodos: estudo transversal realizado com amostra representativa de 3.979 adolescentes da Grande Curitiba. O tempo de tela (televisão, computador e videogame) foi autorrelatado e categorizado em ≤2h/dia, >2 a ≤4h/dia e >4h/dia. A regressão logística ordinal testou as associações. Resultados: amostra com idade média de 14,60±1,88 anos, formada por 51,2% de meninas.A prevalência de tempo de tela >4h/dia foi de 89,3%. Meninas (OR=0,61; IC95%=0,49-0,76) e os grupos de idade mais velhos (“14 a 16 anos” OR=0,29; IC95%=0,22-0,39 e “17 a 19 anos” OR=0,11; IC95%=0,08-0,16) eram menos propensos a estar nos grupos de maior tempo de tela. Conclusões: o tempo de tela acima de quatro horas parece ser o mais prevalente entre os adolescentes. Meninas e adolescentes mais velhos são menos propensos ao maior tempo de tela.

Abstract Objectives: to estimate the prevalence of adolescents’ screen time in three different scenarios and possible associations with gender, sexual maturation, age group, economic class, and nutritional status. Methods: a cross-sectional study conducted with a representative sample of 3,979 adolescents from Greater Curitiba. Screen time (television, computer, and video game) was self-reported and categorized as ≤2h/day, >2 to ≤4h/day, and >4h/day. Ordinal logistic regression tested the associations. Results: the sample consisted of adolescents of 14.60±1.88 years old, most girls (51.2%). The prevalence of screen time >4h/day was 89.3%. Girls (OR=0.61; CI95%=0.49-0.76) and the older age groups (“14 to 16 years” OR=0.29; CI95%=0.22-0.39, and “17 to 19 years” OR=0.11; CI95%=0.08-0.16) were less likely to be in the groups of higher screen time. Conclusions: screen time above four hours seems to be the most prevalent among adolescents. Older girls and teens are less likely to have higher screen time.

Abstract Objective: This longitudinal study aimed to verify possible changes in the time spent in sedentary activities occurring as screen-time, educational, cultural, social, and transportation domains in a sample of Brazilian adolescents between 2015 and 2017. Methods: It is a longitudinal prospective study with 586 adolescents from 12 to 15 years old at the Baseline (2015) enrolled in 14 public schools from Curitiba, Brazil. The Adolescent Sedentary Activity Questionnaire assessed the time spent in sedentary activities in five domains (recreational screen-time, educational, cultural, social, and transportation). A series of linear random effects regressions analyzed changes in the sedentary time between 2015 and 2017, with p < .05. Results: Overall, 323 adolescents dropped out of the study resulting in a retention rate of 44.9%. The overall sedentary time remained stable from 2015 to 2017 (-3.98 min/day, 95%CI: -15.39; 7.42). The screen-time decreased (-22.22 min/day, 95%CI: -30.30; -14.15), and educational (8.29 min/day, 95% CI: 3.52; 13.06), cultural (3.41 min/day, 95% CI: 0.66; 6.15) and social sedentary activities (8.20 min/day, 95% CI: 2.06; 14.34) increased from 2015 to 2017. Conclusion: Significant reductions in screen-time were evidenced along with increases in time spent on other sedentary activities of educational, cultural, and social nature.

SUMMARY OBJECTIVE: The aim was to evaluate the changes in the prevalence of physical inactivity in the Brazilian adults from 2009-2017. METHODS: This study used a time-series research design based on the cross-sectional data of 462,498 Brazilian adults from 2009-2017. Participants were classified as physically inactive if they indicated not participating in physical activity in the last three months. The Prais-Winsten regression analyzed physical inactivity trends over time. RESULTS: The overall prevalence of physical inactivity was stable (p>0.05). Physical inactivity increased for women in four state capitals (annual growth rate: Goiânia 1.62%, Campo Grande 3.28%, Porto Velho 0.93%, and Vitória 2.09%) and decreased in one (annual growth rate: Rio Branco 4.50%). Physical inactivity decreased for men in four state capitals (annual growth rate: Campo Grande 4.72%, Natal 2.73%, São Luís 4.94%, and Rio Branco 2.95%). CONCLUSION: The physical inactivity among the Brazilian adults was stable between 2009 and 2017. Physical inactivity increased in women from Goiânia, Campo Grande, Porto Velho, and Vitória and decreased in women from Rio Branco and in men from Campo Grande, Natal, São Luís, and Rio Branco.

Resumo A presente investigação objetivou verificar modificações no consumo de cigarro e álcool em uma amostra de adolescentes do sistema estadual de ensino da cidade de Curitiba, Paraná, Brasil entre 2015 e 2017. Estudo longitudinal de coorte prospectivo realizado com 799 adolescentes, entre 11 e 15 anos. O consumo leve e excessivo de álcool e de cigarro foram avaliados através do questionário Youth Risk Behavior Survey (YRBS). Modificações do consumo de álcool e cigarro foram avaliadas através de modelos de Equação de Estimação Generalizável com distribuição de Poisson para obtenção de razões de taxas de incidência (RTI) com intervalos de confiança de 95% (IC95%). A variável “tempo” foi tratada como variável independente, juntamente com demais possíveis preditores (sexo, faixa etária, estado nutricional, nível socioeconômico, escolaridade do chefe da família, atividade física e tempo em tela). O consumo de cigarros (RTI= 1,32, IC95%= 1,02; 1,71), consumo leve (RTI= 1,32, IC95%= 1,13; 1,53) e excessivo de álcool (RTI= 1,21, IC95%= 1,04; 1,40) cresceram significativamente entre 2015 e 2017. O presente estudo denota que os adolescentes participantes desta investigação estão modificando seus comportamentos em direção a um estilo de vida menos saudável.

Abstract The scope of this study was to verify alterations in cigarette and alcohol consumption in a sample of adolescents from the state education system of the city of Curitiba in the State of Paraná between 2015 and 2017. It involved a longitudinal prospective cohort study conducted with 799 adolescents (11 to 15 years of age) between 2015 and 2017. The Youth Risk Behavior Surveillance System (YRBS) questionnaire evaluated mild and excessive alcohol and tobacco consumption. Modifications of alcohol and tobacco consumption were evaluated through Generalizable Estimating Equation (GEE) models with Poisson distribution to obtain Incidence Risk Ratios (IRR) with 95% confidence intervals (95%CI). The “time” variable was treated as an independent variable along with other possible predictors (gender, age bracket, nutritional status, socioeconomic level, head of household education, physical activity and screen time). Tobacco consumption (IRR= 1,32, 95%CI = 1,02; 1,71), mild (IRR= 1,32, 95%CI = 1,13; 1,53) and excessive (IRR= 1,21, 95%CI = 1,04; 1,40) alcohol consumption increased between 2015 and 2017. This study indicates that adolescents participating in this research are modifying their behaviors towards a less healthy lifestyle.

Resumo A presente investigação objetivou verificar modificações no consumo de cigarro e álcool em uma amostra de adolescentes do sistema estadual de ensino da cidade de Curitiba, Paraná, Brasil entre 2015 e 2017. Estudo longitudinal de coorte prospectivo realizado com 799 adolescentes, entre 11 e 15 anos. O consumo leve e excessivo de álcool e de cigarro foram avaliados através do questionário Youth Risk Behavior Survey (YRBS). Modificações do consumo de álcool e cigarro foram avaliadas através de modelos de Equação de Estimação Generalizável com distribuição de Poisson para obtenção de razões de taxas de incidência (RTI) com intervalos de confiança de 95% (IC95%). A variável “tempo” foi tratada como variável independente, juntamente com demais possíveis preditores (sexo, faixa etária, estado nutricional, nível socioeconômico, escolaridade do chefe da família, atividade física e tempo em tela). O consumo de cigarros (RTI= 1,32, IC95%= 1,02; 1,71), consumo leve (RTI= 1,32, IC95%= 1,13; 1,53) e excessivo de álcool (RTI= 1,21, IC95%= 1,04; 1,40) cresceram significativamente entre 2015 e 2017. O presente estudo denota que os adolescentes participantes desta investigação estão modificando seus comportamentos em direção a um estilo de vida menos saudável.

Abstract The scope of this study was to verify alterations in cigarette and alcohol consumption in a sample of adolescents from the state education system of the city of Curitiba in the State of Paraná between 2015 and 2017. It involved a longitudinal prospective cohort study conducted with 799 adolescents (11 to 15 years of age) between 2015 and 2017. The Youth Risk Behavior Surveillance System (YRBS) questionnaire evaluated mild and excessive alcohol and tobacco consumption. Modifications of alcohol and tobacco consumption were evaluated through Generalizable Estimating Equation (GEE) models with Poisson distribution to obtain Incidence Risk Ratios (IRR) with 95% confidence intervals (95%CI). The “time” variable was treated as an independent variable along with other possible predictors (gender, age bracket, nutritional status, socioeconomic level, head of household education, physical activity and screen time). Tobacco consumption (IRR= 1,32, 95%CI = 1,02; 1,71), mild (IRR= 1,32, 95%CI = 1,13; 1,53) and excessive (IRR= 1,21, 95%CI = 1,04; 1,40) alcohol consumption increased between 2015 and 2017. This study indicates that adolescents participating in this research are modifying their behaviors towards a less healthy lifestyle.

Resumo Introdução O esporte pode contribuir com a percepção de qualidade de vida dos adolescentes nessa fase de desenvolvimento. Objetivo Comparar os domínios da percepção de qualidade de vida de adolescentes, dos sexos masculino e feminino, praticantes de esporte no contraturno escolar (PE), praticantes de outra modalidade de exercício físico (PMEF) e não praticantes de exercício físico (NPEF). Método O estudo é transversal com delineamento ex post facto, com a população composta por adolescentes e com uma amostra de 374 sujeitos, dividida em três grupos. Para avaliar a percepção de qualidade de vida dos adolescentes, foi utilizado o questionário KIDSCREEN-52, e para a análise comparativa, o teste da Análise de variância (ANOVA) de um fator com post hoc de Scheffe. Resultados As comparações das dimensões de qualidade de vida (QV) mostraram que a prática esportiva é um importante fator para melhores percepções de QV e, consequentemente, uma melhor percepção de bem-estar, isto principalmente para o sexo masculino (F=5,38; 3,86; 4,79; 6,22; 7,93, para sentimentos; estado emocional; autopercepção; amigos; apoio social, respectivamente, p<0,05). Conclusão A prática esportiva, em especial na adolescência, merece destaque, já que os praticantes de esporte no contraturno apresentaram melhores percepções de QV nas diferentes dimensões analisadas.

Abstract Background Sports can enhance adolescents’ quality of life perception in their important development phase. Objective compare the domains of quality of life perception of adolescents, male and female, who participate in sports (SP), or another type of physical exercise (PTPE) and non-physical exercise practitioners (NPEP) in the school counterpart. Method The study is cross-sectional with ex post facto design, and its population is composed of adolescents, with a total sample of 374 subjects, divided into three groups (SP, PTPE, NPEP). To evaluate the perception of quality of life of the adolescents, the KIDSCREEN-52 questionnaire was used, and for the comparative analysis of the data, the Analysis of variance (ANOVA) test of a factor with post hoc of Schefe. Results The comparison of quality of life (QoL) dimensions showed that sports practice is an important factor for better perceptions of QoL, consequently a better perception of well-being, especially for males (F = 5.38, 3.86, 4.79, 6.22, 7.93, for feelings, emotional state, self perception, friends, social support respectively and with p <0.05). Conclusion The sport practice, especially in adolescence, deserves to be highlighted, since those who participate in sports in the counterpart presented significant and better perceptions of QoL in the different dimensions analyzed.

Resumo O objetivo deste artigo é verificar a associação do estado nutricional e da atividade física com a percepção de satisfação da imagem corporal em uma amostra de adolescentes de Curitiba/PR. Compuseram a amostra 844 adolescentes entre 11 a 17 anos. O nível de atividade física foi avaliado pelo Questionário de Atividade Física para Adolescentes. A percepção da imagem corporal foi avaliada pela Escala de Figura de Silhueta e pelo Body Shape Questionnarie. A associação do estado nutricional e do nível de atividade física com a satisfação com a imagem corporal foi realizada através da regressão logística multinominal para obtenção da razão de chances com intervalo de confiança de 95% e p<0,05. O sobrepeso/obesidade esteve associado positivamente com a insatisfação com a imagem corporal (IIC) moderada e grave para meninas (RC: 6,20; IC95%: 2,62 - 14,66 e RC: 6,20; IC95%: 4,10 - 9,36) e meninos (RC: 1,95; IC95%: 1,06 - 3,59 e RC: 3,91; IC95%: 2,57 - 5,95) e com o desejo de diminuir a silhueta para meninos e meninas (RC: 4,86; IC95%: 3,37 - 7,00 e RC: 6,46, IC95%: 4,12 - 10,14). O nível de atividade física não se mostrou associado com a IIC. Adolescentes com sobrepeso e obesidade apresentam maior chance de reportarem IIC. A atividade física não esteve relacionada com a IIC.

Abstract The aim of this article is to verify the association between nutritional status and physical activity with the perception of body image satisfaction in a sample of adolescents from Curitiba, State of Paraná. The sample consisted of 844 adolescents of 11 to 17 years of age. The level of physical activity was evaluated by the Physical Activity Questionnaire for Adolescents. Body image perception was assessed by the Silhouette Shape Scale and the Body Shape Questionnaire. The association between nutritional status and level of physical activity with satisfaction with body image was performed through multinomial logistic regression to obtain the odds ratio with a 95% confidence interval and p < 0.05. Overweight/obesity was positively associated with moderate and severe body image dissatisfaction (BID) among girls (OR: 6.20; 95%CI: 2.62 - 14.66 and OR: 6.20; 95%CI: 4.10 - 9.36) and boys (OR: 1.95; 95%CI: 1.06 - 3.59 e OR: 3.91; 95%CI: 2.57 - 5.95) and with the desire to decrease the silhouette for boys and girls (OR: 4.86; 95%CI: 3.37 - 7.00 and OR: 6.46; 95%CI: 4.12 - 10.14). The level of physical activity was not associated with BID. Adolescents who are overweight and obese are more likely to admit to BID. Physical activity was not related to BID.

Resumo O objetivo deste artigo é verificar a associação do estado nutricional e da atividade física com a percepção de satisfação da imagem corporal em uma amostra de adolescentes de Curitiba/PR. Compuseram a amostra 844 adolescentes entre 11 a 17 anos. O nível de atividade física foi avaliado pelo Questionário de Atividade Física para Adolescentes. A percepção da imagem corporal foi avaliada pela Escala de Figura de Silhueta e pelo Body Shape Questionnarie. A associação do estado nutricional e do nível de atividade física com a satisfação com a imagem corporal foi realizada através da regressão logística multinominal para obtenção da razão de chances com intervalo de confiança de 95% e p<0,05. O sobrepeso/obesidade esteve associado positivamente com a insatisfação com a imagem corporal (IIC) moderada e grave para meninas (RC: 6,20; IC95%: 2,62 - 14,66 e RC: 6,20; IC95%: 4,10 - 9,36) e meninos (RC: 1,95; IC95%: 1,06 - 3,59 e RC: 3,91; IC95%: 2,57 - 5,95) e com o desejo de diminuir a silhueta para meninos e meninas (RC: 4,86; IC95%: 3,37 - 7,00 e RC: 6,46, IC95%: 4,12 - 10,14). O nível de atividade física não se mostrou associado com a IIC. Adolescentes com sobrepeso e obesidade apresentam maior chance de reportarem IIC. A atividade física não esteve relacionada com a IIC.

Abstract The aim of this article is to verify the association between nutritional status and physical activity with the perception of body image satisfaction in a sample of adolescents from Curitiba, State of Paraná. The sample consisted of 844 adolescents of 11 to 17 years of age. The level of physical activity was evaluated by the Physical Activity Questionnaire for Adolescents. Body image perception was assessed by the Silhouette Shape Scale and the Body Shape Questionnaire. The association between nutritional status and level of physical activity with satisfaction with body image was performed through multinomial logistic regression to obtain the odds ratio with a 95% confidence interval and p < 0.05. Overweight/obesity was positively associated with moderate and severe body image dissatisfaction (BID) among girls (OR: 6.20; 95%CI: 2.62 - 14.66 and OR: 6.20; 95%CI: 4.10 - 9.36) and boys (OR: 1.95; 95%CI: 1.06 - 3.59 e OR: 3.91; 95%CI: 2.57 - 5.95) and with the desire to decrease the silhouette for boys and girls (OR: 4.86; 95%CI: 3.37 - 7.00 and OR: 6.46; 95%CI: 4.12 - 10.14). The level of physical activity was not associated with BID. Adolescents who are overweight and obese are more likely to admit to BID. Physical activity was not related to BID.

RESUMO Introdução A prática esportiva estruturada é essencial para a saúde dos adolescentes, visto que a adolescência é um período em que ocorrem diversas mudanças físicas, psicológicas, cognitivas e sociais, no qual a sensação de autonomia na tomada de decisões, pode levá-los a aderir a determinados comportamentos de risco para a saúde. Objetivos Verificar a associação da prática esportiva aos comportamentos de risco para a saúde em atletas adolescentes. Métodos Estudo transversal com 367 atletas (15,68 ± 0,78 anos) de Curitiba/PR. Os fatores associados e os comportamentos de risco para a saúde (CRS) foram avaliados através de questionários. A regressão de Poisson com variância robusta foi utilizada para analisar os fatores associados aos CRS, adotando p < 0,05. Resultados O esporte coletivo foi associado positivamente ao maior tempo de TV (RP: 3,11; IC de 95%: 1,13-8,58). Os anos de prática foram associados positivamente ao maior tempo de TV (RP: 1,14; IC de 95%: 1,01-1,29) e videogame (RP: 1,12; IC de 95%: 1,01-1,25). As associações negativas foram encontradas para o volume de treino semanal no maior tempo de videogame (RP: 0,92; IC de 95%: 0,86-0,99), no baixo consumo de vegetais (RP: 0,98; IC de 95%: 0,96-0,99) e no consumo leve (RP: 0,95; IC de 95%: 0,92-0,99) e excessivo (RP: 0,94; IC95%: 0,89-0,99) de bebidas alcoólicas. Conclusão O volume de treino semanal favorece redução de tempo de videogame, menos consumo de bebida alcoólica e aumento do consumo de vegetais em atletas adolescentes. Nível de Evidência III; Estudos diagnósticos - Investigação de um exame para diagnóstico; Estudo de pacientes não consecutivos, sem padrão de referência “ouro” aplicado uniformemente.

ABSTRACT Introduction Participation in structured sports activities is essential for the health of adolescents, since adolescence is a period in which several physical, psychological, cognitive and social changes occur, where the sense of autonomy in decision-making may prompt them to adhere to certain health risk behaviors. Objective To verify the association of sports participation with health risk behaviors in adolescent athletes. Methods A cross-sectional study with 367 athletes (15.68 ± 0.78 years) from Curitiba/PR (state of Paraná). Associated factors and health risk behaviors (HRB) were assessed using questionnaires. Poisson regression with robust variance was used to analyze factors associated with HRB, adopting p <0.05. Results Team sport was positively associated with longer TV viewing time (PR: 3.11; 95% CI: 1.13-8.58). Years of participation were positively associated with longer TV viewing (PR: 1.14, 95% CI: 1.01-1.29) and video game playing time (PR: 1.12, 95% CI: 1.01-1.25). Negative associations were found for weekly training volume in longer video game playing time (OR: 0.92, 95% CI: 0.86-0.99), low vegetable consumption (PR: 0.98, 95% CI: 0.96-0.99), and in light (PR: 0.95, 95%CI: 0.92-0.99) and excessive (PR: 0.94, 95%CI: 0.89-0.99) alcoholic consumption. Conclusion The weekly training volume favors a reduction in video game playing time, lower alcohol consumption, and increased vegetable consumption in adolescent athletes. Level of Evidence III; Diagnostic studies - Investigation of a diagnostic test; Study of non-consecutive patients, without a “gold standard” applied uniformly.

RESUMEN Introducción La práctica deportiva estructurada es esencial para la salud de los adolescentes, ya que la adolescencia es un período en el que ocurren varios cambios físicos, psicológicos, cognitivos y sociales, en el que el sentimiento de autonomía en la toma de decisiones puede llevarlos a adherirse a ciertas conductas de riesgo para la salud. Objetivos Verificar la asociación entre la práctica deportiva y las conductas de riesgo para la salud en atletas adolescentes. Métodos: Estudio transversal con 367 atletas (15,68 ± 0,78 años) de Curitiba/PR. Los factores asociados y las conductas de riesgo para la salud (CRS) se evaluaron a mediante cuestionarios. La regresión de Poisson con varianza robusta se utilizó para analizar los factores asociados a las CRS, adoptando p < 0,05. Resultados El deporte de equipo se asoció positivamente con un mayor tiempo de televisión (CD: 3,11, IC del 95%: 1,13-8,58). Los años de práctica se asociaron positivamente con un mayor tiempo de televisión (CD: 1,14, IC del 95%: 1,01-1,29) y videojuegos (CD: 1,12, IC del 95%: 1,01-1,25). Se encontraron asociaciones negativas para el volumen de entrenamiento semanal en el tiempo de videojuegos más largo (CD: 0,92; IC del 95%: 0,86-0,99), en el bajo consumo de vegetales (CD: 0,98; IC 95%: 0,96-0,99) y consumo leve (CD: 0,95; IC del 95%: 0,92-0,99) y excesivo (CD: 0,94, IC del 95%: 0,89-0,99) de bebidas alcohólicas. Conclusión El volumen de entrenamiento semanal favorece una reducción en el tiempo de videojuegos, un menor consumo de bebidas alcohólicas y un mayor consumo de vegetales en atletas adolescentes. Nivel de Evidencia III; Estudios de diagnóstico: investigación de una prueba de diagnóstico; Estudio de pacientes no consecutivos, sin un “estándar de oro” aplicado uniformemente.

Resumo Verificar o impacto de fatores associados ao nível insuficiente de atividade física e elevado tempo de tela em adolescentes. Estudo transversal, representativo, com 899 alunos de ensino médio da rede pública de São José dos Pinhais, Paraná, Brasil. Foram mensurados o nível de atividade física e o tempo de tela e classificados respectivamente de acordo com as recomendações da Organização Mundial da Saúde e da American Academy of Pediatrics. Os fatores associados para o nível insuficiente de atividade física e tempo de tela foram: sexo, maturação sexual, apoio social e autoeficacia para a prática de atividade física. As associações foram testadas com a regressão de Poisson. E o impacto dos fatores associados ao nível insuficiente de atividade física e do elevado tempo de tela foram calculadas pela fração atribuível populacional (FAP) e a redução relativa do risco (RRR). Na presença combinada do nível insuficiente de atividades físicas com o elevado tempo de tela, o sexo feminino apresentou uma FAP = 13,04, o estágio pós-púbere FAP = 9,91 e o apoio social apresentou uma RRR = 31,00. Os achados sugerem sexo feminino e estar no estágio pós-púbere como fatores de risco, e apoio social como fator protetor a presença combinada do nível insuficiente de atividade física e do elevado tempo de tela.

Abstract The scope of this study was to verify the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. A cross-sectional and representative study was conducted with 899 public high school adolescents from São José dos Pinhais, Paraná, Brazil. It involved measurement of physical activity levels and screen time and classification according to the norms of the World Health Organization and the American Academy of Pediatrics. The factors associated with insufficient physical activity levels and high screen time were gender, sexual maturation, social support and self-efficacy in terms of physical activity. Poisson regression was applied to test the associations. Population attributable fraction (PAF) and relative risk reduction (RRR) calculated the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. In the combined presence of insufficient physical activity levels with high screen time, the female sex presented PAF = 13.04, a post-pubertal stage PAF = 9.91 and social support presented RRR = 31.00. The findings suggest that being female and post-pubescent are risk factors, while social support is a protective factor, for combined insufficient physical activity levels and high screen time among adolescents.

Resumo Verificar o impacto de fatores associados ao nível insuficiente de atividade física e elevado tempo de tela em adolescentes. Estudo transversal, representativo, com 899 alunos de ensino médio da rede pública de São José dos Pinhais, Paraná, Brasil. Foram mensurados o nível de atividade física e o tempo de tela e classificados respectivamente de acordo com as recomendações da Organização Mundial da Saúde e da American Academy of Pediatrics. Os fatores associados para o nível insuficiente de atividade física e tempo de tela foram: sexo, maturação sexual, apoio social e autoeficacia para a prática de atividade física. As associações foram testadas com a regressão de Poisson. E o impacto dos fatores associados ao nível insuficiente de atividade física e do elevado tempo de tela foram calculadas pela fração atribuível populacional (FAP) e a redução relativa do risco (RRR). Na presença combinada do nível insuficiente de atividades físicas com o elevado tempo de tela, o sexo feminino apresentou uma FAP = 13,04, o estágio pós-púbere FAP = 9,91 e o apoio social apresentou uma RRR = 31,00. Os achados sugerem sexo feminino e estar no estágio pós-púbere como fatores de risco, e apoio social como fator protetor a presença combinada do nível insuficiente de atividade física e do elevado tempo de tela.

Abstract The scope of this study was to verify the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. A cross-sectional and representative study was conducted with 899 public high school adolescents from São José dos Pinhais, Paraná, Brazil. It involved measurement of physical activity levels and screen time and classification according to the norms of the World Health Organization and the American Academy of Pediatrics. The factors associated with insufficient physical activity levels and high screen time were gender, sexual maturation, social support and self-efficacy in terms of physical activity. Poisson regression was applied to test the associations. Population attributable fraction (PAF) and relative risk reduction (RRR) calculated the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. In the combined presence of insufficient physical activity levels with high screen time, the female sex presented PAF = 13.04, a post-pubertal stage PAF = 9.91 and social support presented RRR = 31.00. The findings suggest that being female and post-pubescent are risk factors, while social support is a protective factor, for combined insufficient physical activity levels and high screen time among adolescents.