Liljenberg B, Almqvist M, Hetta J, Roos B E, Agren H
Department of Psychiatry, University Hospital, Uppsala, Sweden.
Ann Clin Res. 1988;20(6):393-8.
Previous studies on the prevalence of sleep disturbances have shown that insomnia occurs in 3.2-42% of different populations. The wide reported variation in prevalence prompted a rigorous definition of insomnia to be introduced in this study. Randomly selected members of the population aged 30 to 65 years from two geographically different rural parts of central Sweden answered a sleep questionnaire. The response rates were 69.2% and 70.2%, respectively. Females significantly more often reported difficulty in falling asleep (7.1% of the women and 5.1% of the men). Among women 8.9 and among men 7.7% of individuals reported trouble with nocturnal awakenings. Using a stringently defined concept of insomnia as a disorder of initiating sleep (DIS), the prevalence rate of insomnia among women was 1.1% and among men 0.5%. Defining insomnia as a disorder of maintaining sleep (DMS), the prevalence among both women and men was 1.1%. Defining insomnia as a disorder of initiating and maintaining sleep (DIMS), the prevalence rate was 1.7% among women and 1.4% among men. This prevalence, which is lower than previously reported, demonstrate the importance of an operational definition of insomnia.
以往关于睡眠障碍患病率的研究表明，失眠在不同人群中的发生率为3.2%至42%。报告的患病率差异很大，促使本研究引入了严格的失眠定义。从瑞典中部两个地理位置不同的农村地区随机选取年龄在30至65岁之间的人群，让他们回答一份睡眠问卷。回复率分别为69.2%和70.2%。女性报告入睡困难的比例明显更高（7.1%的女性和5.1%的男性）。在女性中，8.9%的人和男性中7.7%的人报告有夜间觉醒问题。使用严格定义的失眠概念，即起始睡眠障碍（DIS），女性失眠患病率为1.1%，男性为0.5%。将失眠定义为维持睡眠障碍（DMS），女性和男性的患病率均为1.1%。将失眠定义为起始和维持睡眠障碍（DIMS），女性患病率为1.7%，男性为1.4%。这一患病率低于先前报告的结果，表明了失眠操作性定义的重要性。
