The association between sleep problems and perceived health status: A Japanese nationwide general population survey

Department of Psychiatry, Nihon University School of Medicine, Tokyo, Japan.
Sleep Medicine (Impact Factor: 3.15). 05/2012; 13(7):831-7. DOI: 10.1016/j.sleep.2012.03.011
Source: PubMed


Sleep problems in humans have been reported to impact seriously on daily function and to have a close association with well-being. To examine the effects of individual sleep problems on physical and mental health, we conducted a nationwide epidemiological survey and examined the associations between sleep problems and perceived health status.
Cross-sectional surveys with a face-to-face interview were conducted in August and September, 2009, as part of the Nihon University Sleep and Mental Health Epidemiology Project (NUSMEP). Data from 2559 people aged 20 years or older were analyzed (response rate 54.0%). Participants completed a questionnaire on perceived physical and mental health statuses, and sleep problems including the presence or absence of insomnia symptoms (i.e., difficulty initiating sleep [DIS], difficulty maintaining sleep [DMS], and early morning awakening [EMA]), excessive daytime sleepiness (EDS), poor sleep quality (PSQ), short sleep duration (SSD), and long sleep duration (LSD).
The prevalence of DIS, DMS, and EMA was 14.9%, 26.6%, and 11.7%, respectively, and 32.7% of the sample reported at least one of them. At the complaint level, the prevalence of EDS, PSQ, SSD, and LSD was 1.4%, 21.7%, 4.0%, and 3.2%, respectively. Multiple logistic regression analyses revealed that DMS, PSQ, SSD, and LSD were independently associated with poor perceived physical health status; DIS, EDS, and PSQ were independently associated with poor perceived mental health status.
This study has demonstrated that sleep problems have individual significance with regard to perceived physical or mental health status.

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    • "Moreover, lower perceived health has been reported to be associated with increased risk of mortality, even after adjusting for demographic variables and more objective measures of health such as physician ratings (Idler and Benyamini 1997). Not surprisingly, given that age increases the risk of many chronic illnesses, most studies report perceived health decreases with age (Furihata et al. 2012; Fỳlkesnes and Forde 1992; Shields and Shooshtari 2001), although one study reported perceived health to be comparable between undergraduate and older adult samples (Hooker 1992). "
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    • "There were four response options: never or seldom, once or twice a week, three or four times a week, or five or more times a week. DIS and DMS were defined, according to a previous study, as present if a participant reported having each sleep problem once or more a week[3]; PQS was defined as present if a participant reported having restorative sleep with a feeling of satisfaction upon awakening less than once a week. Another cut-off value (at least three times a week) for the definition of DIS or DMS was used in accordance with the diagnostic and statistical manual of mental disorders (DSM-IV)[17]. "
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