Night 1 for screening also served as the pre-baseline adaptation night in the sleep lab. Night 30 (re-adaptation at the beginning of Phase 2) was not included in statistical analyses. Abbreviations: N = night, OSA = obstructive sleep apnea, PLMS = periodic limb movements in sleep, SR = self-report, PSG = polysomnography, SL = sleep latency, WASO = wake after sleep onset, SE = sleep efficiency, SQ = sleep quality.