Objective This study aimed to further explore sleep-related psychological factors that may contribute to insomnia in obstructive sleep apnea syndrome (OSAS) patients .Methods Total of 60 patients were divided into OSAS group (20 patients) ,primary insomnia (20 patients) and OSAS+ In‐somnia group (20 patients) .All subjects underwent poly-somnography (PSG) overnight and completed a package of questionnaires ,including the Pittsburgh Sleep Quality Index (PSQI) ,Epworth Sleepiness Scale (ESS) ,Self -rating Anxiety Scale (SAS) ,Self - rating Depression Scale(SDS) .Results The OSAS+Insomnia and Insomnia groups had significantly higher levels of anxiety and depression than the OSAS group .The OSAS group had significantly more lethargy than the OSAS+Insomnia and Insomnia groups .Conclusions Although OSAS patients with insomnia showed a similar degree of respiratory dis‐turbances as patients with OSAS only ,their psychological and behavioral profiles resembled the features of primary insomnia patients .The results support the new concept of OSAS comorbid insomnia and sug‐gest the importance of evaluating and treating psychological factors in these patients .%目的：探讨在阻塞性睡眠呼吸暂停综合征（OSAS）患者中的睡眠相关的心理障碍归因于失眠。方法本研究共60例患者，其中20例为单纯OSAS组，20例单纯性失眠组，20例为OSAS共病失眠组。所有患者均行一夜PSG检查及睡眠量表（包括PSQI ，ESS）和心理量表（包括SDS ，SAS）检测。结果 OSAS共病失眠与单纯失眠组均比单纯OSAS组有明显焦虑和抑郁，单纯OSAS组比OSAS共病失眠与单纯失眠组嗜睡明显。结论虽然OSAS共病失眠组与OSAS组睡眠呼吸紊乱程度在同一水平，心理和白天思睡与单纯性失眠的患者相似。这个结论提出了OSAS共病失眠的新概念，同时建议在这些患者中进行心理治疗。
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