An epidemiological study of insomnia among the Japanese general population
TLDR
The study examined the prevalence and correlates of insomnia in a representative sample of Japan and found that older age, being unemployed, lack of habitual exercise, poor perceived health, psychological stress, and being unable to cope with stress were associated with an increased prevalence of insomnia.Abstract:
The study examined the prevalence and correlates of insomnia in a representative sample (n=3030) from the general population of Japan Using a structured questionnaire, we found that the overall prevalence of insomnia during the preceding month was 214%, including difficulty initiating sleep (DIS: 83%), difficulty maintaining sleep (DMS: 150%), and early morning awakening (EMA: 80%) Multiple logistic regression analysis showed that older age, being unemployed, lack of habitual exercise, poor perceived health, psychological stress, and being unable to cope with stress were associated with an increased prevalence of insomnia These findings indicate that the prevalence of insomnia in the general population of Japan is comparable to that reported in Western countries, and that insomnia is associated with multiple psychosocial factorsread more
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Epidemiology of insomnia: what we know and what we still need to learn
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Sex differences in insomnia: a meta-analysis.
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Howard M. Kravitz,Patricia A. Ganz,Joyce T. Bromberger,Lynda H. Powell,Kim Sutton-Tyrrell,Peter M. Meyer +5 more
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Epidemiology of DSM-IV Insomnia in Adolescence: Lifetime Prevalence, Chronicity, and an Emergent Gender Difference
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