RESUMO
OBJECTIVES: To determine the prevalence of sleep-disordered breathing (SDB) in children with asthma compared to non-asthmatic children and to determine if behavior problems are associated with asthma and SDB. STUDY DESIGN: Cross-Sectional. METHODS: Parents of 263 children with asthma and 266 controls ages 2 to 15 years attending routine pediatric office visits completed the Pediatric Sleep Questionnaire (PSQ) and the Child Behavior Checklist. Asthma severity was classified based on NIH guidelines. RESULTS: The prevalence of snoring was significantly higher in asthmatic children (35.5%) than controls (15.7%) and the prevalence of a positive PSQ was significantly higher in asthmatic children (25.9%) than controls (10.6%) (P < 0.001 for both). The effect of asthma was "dose-dependent" as children with more severe asthma had increased odds ratios for snoring and a positive PSQ. On multivariate analysis, there were significant interactions of gender with asthma and age with gender. A positive modified PSQ along with measures of socioeconomic status and age were the only independent predictors of abnormal Child Behavior Checklist scores and score classifications. CONCLUSIONS: There was a higher prevalence of SDB in asthmatic children compared to non-asthmatic children and the prevalence of SDB increased with increasing asthma severity. In multivariate analysis the role of asthma was much less clear as it predicted a positive PSQ in girls but not boys. SDB, but not asthma, was an independent predictor of behavioral problems.
