This study aims to evaluate factors associated with sleep quality (overall and by domains) in adolescents. A cross-sectional study. This study was conducted with 1,296 first-year high school students from public schools in the Northern Region of the State of Pernambuco, Brazil. Demographic, socioeconomic, and behavioral data were obtained with a questionnaire. Sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI) Body mass index (BMI) was calculated based on the ratio of weight and height squared. Multilevel linear and logistic regressions evaluated factors associated with sleep quality. We observed 53% of adolescents reported poor sleep quality. Adolescents at higher risk of clinical depression were 3.45 times more likely to have poor sleep quality (95%CI: 2.04; 5.81), and each additional unit in the social anxiety score presented 1.03 (95%CI: 1.01; 1.05) higher odds of adolescents having poor sleep quality. Adolescents with depressive symptoms had higher sleep latency, greater sleep disturbance, and greater daytime sleep dysfunction. Social anxiety was associated with sleep latency, sleep disturbance, and daytime sleep dysfunction. Higher risk of clinical depression was associated with all domains related to sleep quality. Negative health perception was associated with sleep disturbance, and physical inactivity was associated with daytime sleep dysfunction. Social anxiety and especially higher risk of clinical depression were determinants of poor sleep quality. Changes in sleep latency, sleep disturbance and daytime sleep dysfunction seems to be relevant to poor sleep quality.
Objetivo: Estimar a prevalência de adolescentes inativos fisicamente e identificar fatores associados a esse comportamento. Metodologia: Estudo transversal de abrangência estadual, realizado com 6002 adolescentes do ensino médio do Estado Pernambuco. Foi utilizado o questionário "Global school-based student health survey" (GSHS) aplicado em forma de entrevista coletiva. Os possíveis fatores associados pesquisados foram o sexo, a idade, a cor da pele, o local de residência, a escolaridade materna, o trabalho, o turno, a série e a participação nas aulas de educação física. O desfecho utilizado foi inatividade física, categorizada em sim/não. Foi realizada a análise descritiva, o teste Qui-quadrado e para análise multivariada foi utilizada a regressão logística binária. Resultado: A prevalência de adolescentes classificados como inativos fisicamente foi de 56,0%, sendo a proporção maior de meninas, classificadas como fisicamente inativas 66,6% quando comparado aos meninos (38,6%). As meninas tiveram 3 (IC:2,6-3,2) vezes mais chance de serem inativas quando comparadas aos meninos. Os adolescentes que não participavam das aulas de educação física tiveram 2,4 (IC:2,1-2,8) vezes mais chance de serem inativos. Conclusão: A prevalência de adolescentes inativos fisicamente foi alta, particularmente entre as meninas. Ademais, não participar das aulas de educação física esteve associado a maiores prevalências de inatividade física, o que ressalta a importância dessas aulas para os adolescentes. Assim, são necessárias estratégias em saúde pública visando difundir e estimular a adesão à prática de atividades físicas pelos adolescentes.
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