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The questionnaires collected information about sociodemographic variables, subjective memory impairment, and excessive daytime sleepiness, which was measured by the <jats:styled-content style=\"fixed-case\">J<\/jats:styled-content>apanese version of the <jats:styled-content style=\"fixed-case\">E<\/jats:styled-content>pworth <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>leepiness <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>cale. Information was also collected on sleep hygiene, health\u2010related variables, and psychosocial variables, including perceived social support, social withdrawal, and work status.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 4783 questionnaires that were returned (92.0%), 4185 participants were included in the analysis (valid response rate: 80.5%), after the exclusion of questionnaires with missing data. The average score on the <jats:styled-content style=\"fixed-case\">J<\/jats:styled-content>apanese version of the <jats:styled-content style=\"fixed-case\">E<\/jats:styled-content>pworth <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>leepiness <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>cale was 5.0 \u00b1 3.9 for men and 4.5 \u00b1 3.7 for women. The frequency of excessive daytime sleepiness was 8.3% for men, 5.8% for women, and 7.0% in total. Stepwise multivariate logistic regression revealed the odds ratio of excessive daytime sleepiness as a predictor of subjective memory impairment was 6.06 (95% confidence interval; 3.06\u201312.03).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Elderly people who complain of daytime sleepiness are potential candidates for interventions related to dementia care after careful consideration of other possible causes of sleepiness.<\/jats:p><\/jats:sec>","DOI":"10.1111\/psyg.12139","type":"journal-article","created":{"date-parts":[[2015,7,16]],"date-time":"2015-07-16T11:26:16Z","timestamp":1437045976000},"page":"196-201","source":"Crossref","is-referenced-by-count":23,"title":["Excessive daytime sleepiness is related to subjective memory impairment in late life: a cross\u2010sectional community\u2010based study"],"prefix":"10.1111","volume":"16","author":[{"given":"Tsuyoshi","family":"Okamura","sequence":"first","affiliation":[{"name":"Tokyo Metropolitan 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