Those with overt sleep apnea on the first nocturnal polysomnography had a second study with titration of nasal continuous positive airway pressure.

• 多导睡眠扫描检查，显示第一天夜间有嗜睡症状的患者，参与第二次研究，在鼻腔呼吸道持续正压的情况下进行检定。