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BACKGROUND: The study aimed to analyze the association between pubertal development stages and adiposity in children and adolescents. METHODS: Cross-sectional study conducted in 2007 in Florianópolis, Brazil, with 2339 schoolchildren 32 aged 8 to 14 years old (1107 males). The outcome (adiposity) was evaluated using Z score and 33 percentilee values > = 85 of four skinfolds (triceps, subscapular, suprailiac and calf) and waist 34 circumference. Total body adiposity (Z score of the sum of skinfolds), central adiposity (Z score 35 of waist circumference) and peripheral adiposity (Z scores of triceps and calf skinfolds) were 36 estimated. Pubertal development stages was self-assessed according to Tanner stages of development. Thirty-seven Children and adolescents were classified according to tertiles of age for each pubertal development stages 38 stage - early, normal and late. Statistical analysis was performed using univariate and 39 multivariate Poisson regression models. RESULTS: Children and adolescent from both sexes with early pubertal development stages presented higher prevalence of central adiposity (waist circumference), with adjusted prevalence ratio (CI 95%) of 2.21 (1.12; 4.35) for males and 2.18 (1.04; 4.57) for females (reference group: normal pubertal development stages). Among females, there was a reduction in the prevalence of excess adiposity with decreased occurrence of early pubertal development stages. There was a strong relationship between adiposity and pubertal development stages. CONCLUSIONS: Excess adiposity was higher in both sexes for those with early pubertal development stages.

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BACKGROUND: Promoting physical activity (PA) in low- and middle-income countries is an important public health topic as well as a challenge for practice. This study aimed to assess the effect of a school-based intervention on different PA-related variables among students. METHODS: This cluster-randomized-controlled trial included 548 students in the intervention group and 537 in the control group (11-18 years-old) from 6 schools in neighborhoods with low Human Development Index (0.170-0.491) in Fortaleza, Brazil. The intervention included strategies focused on training teachers, opportunities for PA in the school environment and health education. Variables measured at baseline and again at the 4-months follow-up included the weekly time in different types of moderate-to-vigorous PA (MVPA), preference for PA during leisure-time, PA behavioral change stage and active commuting to school. Generalized linear models and binary logistic regressions were used. RESULTS: An intervention effect was found by increasing the weekly time in MVPA (effect size = 0.17), popular games (effect size = 0.35), and the amount of PA per week (effect size = 0.27) among students (all P < .05). CONCLUSIONS: The intervention was effective in promoting improvements in some PA outcomes, but the changes were not sufficient to increase the proportion of those meeting PA recommendations.

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OBJECTIVE: Verify the prevalence and sociodemographic and economic factors associated with behavior change stages for habitual physical activity practice in adolescents from Santa Catarina. METHODS: Secondary analysis of a study on the Behavior of Adolescents from Santa Catarina (CompAC 2). Cross-sectional school-based study of 6,529 high-school students (males, n=2,903) from the state of Santa Catarina public education system in 2011, aged 15 to 19 years. Multinomial logistic regression (crude and adjusted) was used to measure the association. RESULTS: The highest and lowest prevalence rates were found in the maintenance (43.9%) and precontemplation stages (7.0%), respectively. The stages of action, preparation and contemplation showed similar results: 16.2%; 17.0% and 15.6%; respectively. Male adolescents show higher prevalence in the maintenance stage in relation to females and these show a higher prevalence in preparation, contemplation and precontemplation. All the assessed variables (gender, age, area of residence, employment status, family income, maternal education and school grade), with the exception of school shift, were associated with at least one of the stages. CONCLUSIONS: A large proportion of adolescents are in the pre-adoption stages and most of these have the intention to start regular physical activity. With the exception of school shift, the assessed variables were associated with stages in different ways, showing different profiles in relation to sociodemographic and economic characteristics in each subgroup.

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BACKGROUND: Studies addressing the influence of early sexual maturation on the excess of body weight and height of children and adolescents are scarce. The aim of the study was to analyze the association of sexual maturation with excess body weight and height in children and adolescents. METHODS: This was a cross-sectional study performed in Florianópolis city, Brazil, in 2007, with 2339 school children, aged 8-14 years (1107 males). Selection was based on a probabilistic, cluster-stratified sampling technique. School children were classified according to the presence of excess body weight, using sex- and age-specific body mass index (BMI) cutoff points. Z-scores were calculated from height and BMI data. Sexual maturation was self-assessed according to Tanner stages of development. Subjects were ranked based on tertiles of sexual maturation (early, normal and late) for each stage of development. Poisson and linear regression models were used. RESULTS: Compared to the reference group (normal sexual maturation), early maturing females had higher prevalence of excess weight (adjusted prevalence ratio: 1.70; 95% CI: 1.24 to 2.33) and increased height-for-age (adjusted ß: 0.37; 95% CI: 0.14 to 0.59), while late maturing females had lower prevalence of excess weight (adjusted prevalence ratio: 0.57; 95% CI: 0.37 to 0.87) and decreased height-for-age (adjusted ß: -0.38; 95% CI: -0.56 to -0.20). In males, early and late sexual maturation were associated with increased (adjusted ß: 0.37; 95% CI: 0.14 to 0.59) and decreased (adjusted ß: -0.38; 95% CI: -0.56 to -0.20) height-for-age, respectively. CONCLUSION: Early sexual maturation is associated with excess body weight in females and with greater height-for-age in both sexes.

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Objetivos Investigar alguns fatores relacionados com a qualidade de vida de professores de educação básica do município de Florianópolis, SC, Brasil, considerando as características do trabalho docente. Métodos 349 professores das redes municipal e estadual de educação, que trabalhavam em escolas das diferentes regiões do município, responderam a um questionário com questões relacionadas ao trabalho e ao Whoqol-bref. Foram realizadas análises descritivas e testes de diferenças entre médias dos indicadores de qualidade de vida geral e dos domínios físico, psicológico, relações sociais e meio ambiente. Resultados Os professores com maior carga horária semanal e aqueles da rede estadual de ensino apresentaram menores índices de qualidade de vida em todos os domínios investigados. Professores com mais tempo de serviço no magistério apresentaram menores índices de qualidade de vida considerando o domínio físico (p=0,007) e relações sociais (p<0,001). Os professores em cargo de direção/supervisão apresentaram escores superiores de qualidade de vida no domínio meio ambiente em relação aos professores de sala de aula. Conclusões Em síntese a redução da carga horária parece ser o principal fator associado com menores índices de qualidade de vida na amostra.

Objectives Investigating some pertinent factors associated with elementary education teachers' quality of life working in the Brazilian city of Florianopolis and surrounding district. Methods 349 state and municipal school system elementary school teachers working in the city and its surrounding areas answered a questionnaire containing work-related questions and the WHO Quality of Life-BREF (WHOQOL-BREF) questionnaire. Descriptive statistics were used and the differences between means were analyzed, considering physical, psychological, social relationships and environmental domains. Results Teachers working more hours per week and in the state school system had lower quality of life indices in all domains investigated. Those having more years of service in the teaching profession had lower quality of life indexes regarding the physical (p=0.007) and social relationships (p<0.001) domains. Teachers occupying management/supervisory posts had higher quality of life scores in the environmental domain compared to classroom teachers. Conclusions The hours worked seemed to be the main factor associated with lower quality of life scores in this sample of elementary school teachers.

Objetivos Investigar algunos factores relacionados con la calidad de vida de profesores de educación básica del municipio de Florianópolis, SC, Brasil, considerando las características del trabajo docente. Métodos 349 profesores de las redes municipal y estadual de educación, que trabajaban en escuelas de las diferentes regiones del municipio, respondieron a un cuestionario con preguntas relacionadas al trabajo y al Whoqol-bref. Fueron realizados análisis descriptivos y tests de diferencias entre medias de los indicadores de calidad de vida general y de los dominios físico, psicológico, relaciones sociales y medio ambiente. Resultados Los profesores con mayor carga horaria semanal y aquellos de la red estadual de enseñanza presentaron menores índices de calidad de vida en todos los dominios investigados. Profesores con más tiempo de servicio en magisterio presentaron menores índices de calidad de vida, considerando el dominio físico (p=0,007) y relaciones sociales (p<0,001). Los profesores en cargos de dirección/supervisión presentaron resultados superiores de calidad de vida en el dominio medio ambiente, en relación a los profesores que dan clases. Conclusiones En síntesis, la reducción de la carga horaria parece ser el principal factor asociado a menores índices de calidad de vida en la muestra.

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OBJECTIVES: To compare the prevalence of television (TV) watching and of computer/videogame use among high school students (15-19 years) from Southern Brazil between 2001 and 2011 and to identify associated socio-demographic factors. METHODS: Panel studies were conducted with high school students in the state of Santa Catarina, Brazil, in 2001 (n = 5,028) and 2011 (n = 6,529). TV watching and computer/videogame use were collected using questionnaires. RESULTS: Prevalence of ≥2 h/day of TV watching dropped from 76.8 to 61.5 % and ≥2 h/day of computer/videogame use increased from 37.9 to 60.6 %. In both surveys, those aged 15-16 and those who did not work had higher likelihoods of being exposed to ≥2 h/day of TV watching. Boys, those with higher family income, and those who were living in urban areas had higher likelihoods of ≥2 h/day of computer/videogame use. Older age, studying at night and not working were protective factors to these behaviors. CONCLUSIONS: After a decade, there was a decrease in the prevalence of TV viewing and an increase in computer/videogame use. Socio-demographic factors were differently associated with these behaviors.

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