{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T16:51:58Z","timestamp":1769187118419,"version":"3.49.0"},"reference-count":31,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2020,12,3]],"date-time":"2020-12-03T00:00:00Z","timestamp":1606953600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J Geriat Psychiatry"],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>The purpose of this study was to clarify the association between self\u2010reported night sleep duration and cognitive functions such as word memory, story memory, attention, executive function, and processing speed of older adults with normal global cognitive function.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 241 functionally independent older adults (mean age, 75.5 \u00b1 6.4 years) participated in this study. No participants had a history of dementia diagnosis, and each had a Mini\u2010Mental State Examination (MMSE) score \u2265 24. Participants were evaluated for self\u2010reported sleep duration and cognitive function using the National Center for Geriatrics and Gerontology\u2010Functional Assessment Tool (NCGG\u2010FAT).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The longest sleep duration group (\u22659 h) had lower MMSE scores (<jats:italic>p<\/jats:italic> = 0.010), Z\u2010score of word list memory II (delayed recall; <jats:italic>p<\/jats:italic> = 0.001), and Z\u2010score of story memory II (delayed recognition; <jats:italic>p<\/jats:italic> = 0.002) than the medium sleep duration group (7\u20138 h). Longest and long sleep duration (8\u20139 h) was significantly associated with impairment of story memory II (longest sleep duration: adjusted odds ratio [OR] = 3.58, 95% confidence interval [CI] = 1.13\u201311.37, long sleep duration: adjusted OR = 4.30, 95% CI = 1.34\u201313.82) with reference to medium sleep duration, but no impairment of MMSE according to multiple logistic regression analysis. Furthermore, short sleep duration (&lt;7 h) was not associated with cognitive impairment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This study suggests that long sleep duration is associated with cognitive impairment, especially of story memory (delayed recognition) in older adults with normal global cognitive function.<\/jats:p><\/jats:sec>","DOI":"10.1002\/gps.5476","type":"journal-article","created":{"date-parts":[[2020,11,21]],"date-time":"2020-11-21T11:03:45Z","timestamp":1605956625000},"page":"766-774","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Association between self\u2010reported night sleep duration and cognitive function among older adults with intact global cognition"],"prefix":"10.1002","volume":"36","author":[{"given":"Risa","family":"Kondo","sequence":"first","affiliation":[{"name":"Department of Public Health Kochi Medical School Kochi University  Kochi 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