Change in sleep quality Induced by adaptive servo-ventilation for central sleep apnea: 6-month follow-up of the multicenter nationwide French FACIL-VAA cohort

A large number of symptomatic individuals with central sleep apnea (CSA) in clinical practice have an indication for adaptive servo-ventilation (ASV) therapy. What are the effects of ASV therapy on sleep quality and PROMs in patients with CSA across a range of devices and indications. This prospective, multicenter, observational cohort study was conducted in France and enrolled participants from June 2017 to February 2020. Adults with predominant CSA at diagnosis or obstructive sleep apnea with central events not controlled with continuous positive airway pressure who had an indication for ASV were eligible. Participants attended clinic visits at baseline, and after 1, 3, 6 and 12 months of follow-up. The primary endpoint was the change in Pittsburgh Sleep Quality Index (PSQI) score from baseline to 6-month follow-up (evaluated using a Wilcoxon signed rank test on paired data). We included 526 individuals (median age 69 years, 88.2% male). The indication for ASV included CSA with cardiovascular/neurologic etiology (38.4%), treatment-emergent CSA (36.1%), idiopathic CSA (14.1%) or drug-induced CSA (11.4%). At 6-month follow-up, study participants were using ASV for a median of 6.1 h/night. The median [interquartile range] change in the PSQI score from baseline to 6 months in the overall study population was –1 [–3; 0] (p