Validation studies confirmed strong internal consistency, test-retest reliability, and correlations with established sleep apnea measures. The American Academy of Sleep Medicine (AASM) has developed and validated a patient-reported outcome tool for use in a clinical setting to monitor treatment response and longitudinal symptom progression in adults who have obstructive sleep apnea (OSA). Scores from the PLATO questionnaire also discriminate between sleep apnea severity levels and body mass index groups, and they are responsive to symptom improvement. “The PLATO questionnaire is a valid and reliable patient-reported outcome tool that fills a significant void in the field of sleep medicine,” says lead author Douglas Kirsch, MD, FAAN, FAASM, a board-certified sleep medicine physician and past president of the AASM, in a release. The process included:cognitive interviews with patients,pilot testing in 10 AASM-accredited sleep centers,and psychometric validation using longitudinal online surveys in 560 adults with sleep apnea and 40 controls.