Isaiah A, et al. - Researchers examined if the treatment-related results of obstructive sleep apnea (OSA) are causally connected with its resolution or changes in severity as assessed by polysomnography. From the Childhood Adenotonsillectomy Trial, a randomized trial comparing the outcomes of early adenotonsillectomy to watchful waiting in children with OSA, they obtained outcomes related to polysomnography, cognitive, behavior, quality-of-life, and health at baseline and at 7 months. They performed the inclusion of a total of 398 children aged 5 to 9 years. The resolution of OSA at follow-up was observed in a total of 244 (61%). The analysis revealed the preponderance of the treatment-related changes in outcomes of OSA in school-aged children is not causally attributable to polysomnographic resolution or changes in its severity. Results thereby highlight the limited utility of polysomnographic thresholds in the management of childhood OSA.