Abstract
IntroductionSocial jetlag is associated with several negative health outcomes, but its impact on asthma control has not been previously investigated. Although impaired sleep is common in asthma, studies on the relationship between sleep quality, social jetlag and asthma control in adolescents are scarce. ObjectiveTo investigate the relationship between asthma control and sleep quality, sleep-wake pattern and excessive daytime sleepiness in adolescents. MethodsThis was a cross-sectional study of 1457 Brazilian high-school adolescents. Asthma was identified using the International Study of Asthma and Allergies in Childhood questionnaire, and disease control was measured by the Asthma Control Test. Sleep-wake pattern and social jetlag were assessed by the Munich Chrono-Type Questionnaire; sleep quality, by the Pittsburgh Sleep Quality Index; and daytime sleepiness, by the Epworth Sleepiness Scale. ResultsAsthma was present in 250 (17.2%) participants and was classified as uncontrolled in 120 (47.9%). Both uncontrolled and controlled asthma groups, compared with non-asthmatics, had worse sleep quality (81.7% vs 77.4% vs 56.5%; p < 0.001) and excessive daytime sleepiness (EDS: 56.2% vs 56.5% vs 39.2%; p < 0.001). On average, adolescents with uncontrolled asthma, compared to non-asthmatics, showed later sleep onset (mean ± SD: 23:54pm ± 1 h:45min vs 23:20pm ± 1 h:27min; p = 0.002) and shorter sleep duration (5.7 h ± 1.8 h vs 6.3 h ± 1.4 h; p = 0.002) on school days. No significant difference in social jetlag was found among the three groups. ConclusionsAsthma is associated with EDS and poor-quality sleep in adolescents. Social jetlag is common in these subjects and is not related to the presence and control of asthma.
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