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Objective/background: Sleep disorders in cystic fibrosis may be present before daytime clinical manifestations, regardless of lung function impairment, affecting quality of life and disease progression. This study investigated the prevalence of obstructive sleep apnea in children and adolescents with cystic fibrosis and preserved lung function or mild impairment, and evaluated its association with clinical variables.
Methods: A systematic review with meta-analysis of prevalence was conducted, including observational studies with polysomnographies in patients with cystic fibrosis who presented mean lung function values > 60% predicted. The methodological quality of the studies was analyzed, and a meta-analysis was performed to assess the prevalence of obstructive sleep apnea.
Results: Of the 2318 studies identified, 7 were included in the systematic review and 6 in the meta-analysis of prevalence. The confounding factors and strategies identified were the items with greatest weakness in the methodological quality assessment. Most studies were cross-sectional, and sample size ranged from 9 to 67 individuals. The most frequent criterion for defining obstructive sleep apnea was apnea-hypopnea index (AHI) > 1 per hour. The prevalence found ranged from 32.3 to 100% and the pooled prevalence was 65% (I = 53.4%), considering AHI>1, and 52% (I = 89.4%) for AHI>2 per hour. It was not possible to verify the association between obstructive sleep apnea and clinical variables.
Conclusions: A high prevalence of obstructive sleep apnea in children and adolescents with cystic fibrosis was found, regardless of age and lung function impairment, reinforcing the importance of investigating sleep-disordered breathing during clinical visits even when lung function is not yet compromised.
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| http://dx.doi.org/10.1016/j.sleep.2021.09.017 | DOI Listing |
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