{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T05:56:12Z","timestamp":1792130172287,"version":"4.4.0"},"reference-count":50,"publisher":"Oxford University Press (OUP)","issue":"11","license":[{"start":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T00:00:00Z","timestamp":1789689600000},"content-version":"vor","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,10,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Sleep duration has well-established U-shaped associations with cognitive health, but research has largely ignored spousal interdependence. This study examined actor and partner effects of sleep duration on global cognition in middle-aged and older Chinese couples, testing whether associations differed by sex.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Data were drawn from CHARLS waves 1-4 (2011-2018). The analytical sample comprised 4260 couples (8520 individuals) aged \u226545\u2009years living in a married, 2-person, mixed-sex household. Global cognition was assessed with a composite battery adapted from the Telephone Interview for Cognitive Status and Chinese Mini-Mental State Examination; nocturnal sleep and napping durations were self-reported. Actor-Partner Interdependence Models with quadratic terms examined actor effects (own sleep predicting own cognition) and partner effects (own sleep predicting spouse\u2019s cognition), with false discovery rate (FDR)-adjusted q-values and sex-equality tests.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Significant inverted U-shaped actor effects were found for wives (\u03b2\u2009=\u2009\u22120.010, 95% CI: \u22120.014, \u22120.005, p\u2009&amp;lt;\u2009.001) and husbands (\u03b2\u2009=\u2009\u22120.011, 95% CI: \u22120.016, \u22120.006, p\u2009&amp;lt;\u2009.001); both survived FDR correction (q\u2009=\u20090.002, q\u2009&amp;lt;\u20090.001). Husbands\u2019 sleep was nominally associated with wives\u2019 cognition similarly (\u03b2\u2009=\u2009\u22120.005, p\u2009=\u2009.025), while wives\u2019 sleep was not associated with husbands\u2019 cognition (p\u2009=\u2009.618). The husband-to-wife association did not survive FDR correction (q\u2009=\u20090.239), and sex-equality tests were non-significant (\u03c7\u00b2(9)\u2009=\u20099.35, p\u2009=\u2009.406). Napping showed limited, largely non-significant associations with cognition.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Own nocturnal sleep duration shows a robust, symmetric inverted U-shaped association with cognitive function in both spouses. The possible husband-to-wife partner effect did not survive correction for multiple testing and warrants adequately powered investigation before informing couple-based clinical recommendations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/gerona\/glag235","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T19:34:41Z","timestamp":1789673681000},"source":"Crossref","is-referenced-by-count":0,"title":["Wife-husband differences in the associations between sleep durations and global cognition among middle-aged and older married couples in China: a longitudinal dyadic analysis"],"prefix":"10.1093","volume":"81","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1025-7785","authenticated-orcid":false,"given":"Jie","family":"Zhong","sequence":"first","affiliation":[{"name":"School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong , Hong Kong,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Dai","sequence":"additional","affiliation":[{"name":"School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong , Hong Kong,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3958-8609","authenticated-orcid":false,"given":"Xiang","family":"Qi","sequence":"additional","affiliation":[{"name":"Rory Meyers College of Nursing, New York University, New York, New York ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Liang","sequence":"additional","affiliation":[{"name":"School of Nursing, Nanjing Medical University, Nanjing ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"key":"2026101601413986500_glag235-B1","doi-asserted-by":"publisher","first-page":"765584","DOI":"10.3389\/fneur.2021.765584","article-title":"Reducing the risk of cognitive decline and dementia: WHO recommendations","volume":"12","author":"Chowdhary","year":"2021","journal-title":"Front Neurol"},{"key":"2026101601413986500_glag235-B2","doi-asserted-by":"publisher","first-page":"81","DOI":"10.1016\/S1474-4422(19)30290-X","article-title":"Dementia in China: epidemiology, clinical management, and research advances","volume":"19","author":"Jia","year":"2020","journal-title":"Lancet Neurol"},{"key":"2026101601413986500_glag235-B3","doi-asserted-by":"publisher","first-page":"302","DOI":"10.5694\/mja2.50972","article-title":"Dementia prevention: the time to act is now","volume":"214","author":"Chong","year":"2021","journal-title":"Med J Aust"},{"key":"2026101601413986500_glag235-B4","doi-asserted-by":"publisher","first-page":"e86262","DOI":"10.2196\/86262","article-title":"AI and wearables for early detection of cognitive impairment and dementia: systematic review","volume":"28","author":"Cejudo","year":"2026","journal-title":"J Med Internet Res"},{"key":"2026101601413986500_glag235-B5","doi-asserted-by":"publisher","first-page":"29","DOI":"10.1016\/j.smrv.2014.03.007","article-title":"Sleep and Alzheimer\u2019s disease","volume":"19","author":"Peter-Derex","year":"2015","journal-title":"Sleep Med Rev"},{"key":"2026101601413986500_glag235-B6","doi-asserted-by":"publisher","first-page":"1235","DOI":"10.1016\/j.jalz.2018.05.012","article-title":"Sleep disturbances and dementia risk: a multicenter study","volume":"14","author":"Sindi","year":"2018","journal-title":"Alzheimers. 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