Øverland B, et al. - In this prospective study involving 97 children (aged 2 to 6 years) who were referred to an Ear, Nose and Throat department for adenoidectomy and/or tonsillectomy, researchers explored the associations between obstructive sleep apnea (OSA)-18 and polysomnography (PSG) findings, beyond the apnea hypopnea index (AHI). All the children underwent PSG and a physical examination prior to surgery, and their parent completed the OSA-18 questionnaire. Spearman correlations were used to determine the links between OSA-18 scores and PSG parameters. Participants in the study were children who had PSG and their parents who answered the OSA-18 questionnaire. Positive associations were observed between the AHI and both the OSA-18 total score and the sleep disturbance subscale. The only other PSG parameter that associated significantly with the OSA-18 was the number of awakenings and arousals per sleeping hour. The authors found only poor associations between the OSA-18 score and PSG results, indicating different aspects of pediatric OSA are assessed by the two methods.