• Anne B Chang, John J Oppenheimer, Miles Weinberger, Cameron C Grant, Bruce K Rubin, Richard S Irwin, and CHEST Expert Cough Panel.
• Division of Child Health, Menzies School of Health Research, Lady Cilento Children's Hospital, Qld Uni of Technology Queensland, Australia; Respiratory and Sleep Department, Lady Cilento Children's Hospital, Qld Uni of Technology Queensland, Australia. Electronic address: annechang@ausdoctors.net.
• Chest. 2017 Sep 1; 152 (3): 607-617.

BackgroundThere is no published systematic review on the etiologies of chronic cough or the relationship between OSA and chronic cough in children aged ≤ 14 years. We thus undertook a systematic review based on key questions (KQs) using the Population, Intervention, Comparison, Outcome format. The KQs follow: Among children with chronic (> 4 weeks) cough (KQ 1) are the common etiologies different from those in adults? (KQ 2) Are the common etiologies age or setting dependent, or both? (KQ 3) Is OSA a cause of chronic cough in children?MethodsWe used the CHEST Expert Cough Panel's protocol and the American College of Chest Physicians (CHEST) methodological guidelines and Grading of Recommendations Assessment, Development, and Evaluation framework. Data from the systematic reviews in conjunction with patients' values and preferences and the clinical context were used to form recommendations. Delphi methodology was used to obtain consensus.ResultsCombining KQs 1 and 2, we found moderate-level evidence from 10 prospective studies that the etiologies of cough in children are different from those in adults and are setting dependent. Data from three studies found that common etiologies of cough in young children were different from those in older children. However, data relating sleep abnormalities to chronic cough in children were found only in case studies.ConclusionsThere is moderate-quality evidence that common etiologies of chronic cough in children are different from those in adults and are dependent on age and setting. As there are few data relating OSA and chronic cough in children, the panel suggested that these children should be managed in accordance with pediatric sleep guidelines.Copyright © 2017. Published by Elsevier Inc.

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