OBJETIVO: Este estudo teve como objetivo determinar a associação do índice de massa corporal (IMC) com os níveis de atividade física (AF) e comportamentos sedentários (assistir TV, usar computador ou jogar videogames) em adolescentes de escolas públicas do Estado de Santa Catarina (15-19 anos; n = 5.028). MÉTODOS: As informações foram coletadas por meio de questionário desenvolvido e validado para adolescentes. Foram considerados insuficientemente ativos, os jovens que não acumulavam pelo menos 300 minutos/semana de atividades físicas moderadas ou vigorosas. Considerou-se para o uso excessivo de TV e computador/games um tempo > 2 horas/dia; para excesso de peso corporal, utilizou-se a tabela internacional de IMC para adolescentes. RESULTADOS: O excesso de peso corporal foi mais prevalente entre os rapazes (12,7% vs 7,9%, p<0,001), e houve uma maior proporção de moças insuficientemente ativas (37,0% vs 21,0%, p<0,001). A chance de ter excesso de peso corporal foi 74% maior entre os rapazes pouco ativos em comparação com os ativos, e entre as moças de menor renda familiar (OR=1,85) e as que residiam na zona urbana (OR=2,22). A chance de serem menos ativos foi 43% maior entre os rapazes que assistiam mais TV e 73% maior para aqueles com excesso de peso corporal. Nas moças, a chance de pouca atividade física foi 54% maior entre as que trabalhavam. CONCLUSÕES: a prevalência de excesso de peso corporal foi maior entre os rapazes, mesmo sendo mais ativos do que as moças. Nos rapazes, o excesso de peso estava significativamente associado à menor prática de atividade física e, nas moças, à menor renda familiar e local de moradia.
-Several school-based epidemiological surveys have been conducted by researchers worldwide. The aim of this article is to describe the methodological aspects used in planning the COMPAC Project (Behavior of Adolescents from Santa Catarina state) carried out in 2001 and 2011. The project presents state-wide school-based epidemiological characteristics (panel study). The population included public high school students between the ages of 15 to 19 years old from Santa Catarina. The sample (n = 5,028 in 2001; n = 6,529 in 2011) was representative of the six geographic regions of the state and was done in two stages, selecting the following items: (1) schools stratified by size (large: 500 or more students; medium: 200-499, and small: fewer than 200); and (2) shifts (day and evening), randomly chosen considering the proportion of students per grade and shift. In 2001, 5,463 students took part in the study, but 380 were excluded for being outside the age range and 55 were removed because they filled out the questionnaire incorrectly. In 2011, 7,077 students participated, but 508 were excluded and 40 removed for the same reasons mentioned above. The students responded a questionnaire on lifestyle and health risk behavior. Both surveys found a greater proportion of girls, single individuals, living with their family and residing in urban areas. The 2001 survey revealed a higher proportion of 17 to 19 year-olds who worked, who were enrolled in the second year of high school, and studied in the evening when compared to the 2011 survey. The methodological tools utilized in this study will can support the development of research with high school adolescents. Key words: Adolescent behavior; Epidemiology; Methodology; Questionnaires. Resumo -Diversos levantamentos epidemiológicos de base escolar têm sido realizados por pesquisadores do mundo inteiro. O objetivo deste artigo é descrever os aspectos metodológicos utilizados no planejamento do projeto COMPAC (Comportamento do
LicenceAbstract -The association between health behaviors and sleep patterns in youths has been tested using cross-sectional data, and prospective evidence is needed. The aim of this study was to investigate the cross-sectional and prospective associations between behavioral variables and sleep quality and duration. A secondary analysis was conducted using data that were collected in March and December 2006 from a random sample of high school students (aged 14-24 years) from Recife and Florianopolis, Brazil, for the "Saúde na Boa" intervention. Data on the perception of sleep quality and duration and lifestyle variables were obtained through self-reported questionnaires. Data were analyzed using crude and adjusted binary logistic regressions. The percentages of students reporting poor sleep quality and insufficient sleep duration were 45.7% and 76.7%, respectively, considering the cross-sectional data, and 45.8% and 77.5%, respectively, considering the longitudinal data. There was a cross-sectional association between lower physical activity (OR = 0.74, 95% CI: 0.55, 0.99) and higher snack consumption (OR = 1.67, 95% CI: 1.18, 2.36) and negative sleep quality. Excessive TV watching (OR = 0.48, 95% CI: 0.30, 0.75) and higher levels of soft drink consumption (OR = 1.84, 95% CI: 1.19, 2.84) were associated with insufficient sleep duration. However, no behavioral variables were associated with sleep quality and duration in the prospective analysis. The prevalence of self-reported poor sleep quality and duration were similar in the cross-sectional and longitudinal analyses. Some behaviors were associated with sleep patterns in the cross-sectional analyses, but these findings were not confirmed in the prospective analyses. Key words: Adolescent, Adolescent behavior; Brazil; Prospective studies; Sleep. (OR = 0,74; IC 95%: 0,55; 0,99) e o maior consumo de salgados (OR = 1,67; IC 95%: 1,18;2,36) estiveram associados à qualidade negativa do sono, enquanto o tempo excessivo de televisão (OR = 0,48; IC 95%: 0,30; 0,75) Resumo -A associação entre comportamentos de saúde e sono tem sido testada em jovens com dados transversais, mas evidências prospectivas são necessárias. O objetivo do estudo foi verificar associações transversais e prospectivas entre variáveis comportamentais e percepções
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