{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T13:21:26Z","timestamp":1783689686771,"version":"3.55.0"},"reference-count":50,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T00:00:00Z","timestamp":1783641600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T00:00:00Z","timestamp":1783641600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R03AG087439"],"award-info":[{"award-number":["R03AG087439"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R01AG083799"],"award-info":[{"award-number":["R01AG083799"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["5K99AG083234\u201002"],"award-info":[{"award-number":["5K99AG083234\u201002"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006093","name":"Patient-Centered Outcomes Research Institute","doi-asserted-by":"publisher","award":["DE\u20102023C1\u201031327"],"award-info":[{"award-number":["DE\u20102023C1\u201031327"]}],"id":[{"id":"10.13039\/100006093","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000957","name":"Alzheimer's Association","doi-asserted-by":"publisher","award":["AACSF\u201023\u20101148490"],"award-info":[{"award-number":["AACSF\u201023\u20101148490"]}],"id":[{"id":"10.13039\/100000957","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sleep Research"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Postoperative delirium (POD) is a common occurrence for patients in the postanaesthesia care unit (PACU) or intensive care units. A growing body of literature suggests sleep habits may be related to one's risk of developing delirium. However, these sleep habits have yet to be objectively measured via actigraphy during a lengthy follow\u2010up. We analysed 6\u2009days of actigraphy data collected from 54,845 UK Biobank participants who had at least one hospitalisation during an 8\u2010year follow\u2010up. Nap duration (sleep between 9\u2009AM and 7\u2009PM), nap frequency, overnight sleep duration (between 7\u2009PM and 9\u2009AM) and wake after sleep onset (WASO) were examined from actigraphy data. Cox proportional hazards models analysed whether these objective sleep behaviours predicted POD risk. Nappers were at an increased risk of POD development for every additional 30\u2009min (HR\u2009=\u20091.15; 95% CI: [1.06\u20131.25],\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001) of napping and for every additional nap (1.13 [1.05\u20131.21],\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001) per day. Those who recorded \u2265\u20099\u2009h of overnight sleep (1.19; [0.70\u20132.02.],\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.521) or &lt;\u20096\u2009h of overnight sleep (1.15; [0.84\u20131.57],\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.381) showed no significant increase in POD risk compared to 6\u20139\u2010h overnight sleepers. There was no significant increased risk in POD for each additional minute of WASO (1.00; [1.00\u20131.00],\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.463). We conclude that napping is associated with an increased risk for POD development. Whether napping is a controllable factor that can limit POD development or a symptom of a more significant cognitive pathology is still unknown. Further studies are required to understand the relationship between napping and cognitive insult.\n                  <\/jats:p>","DOI":"10.1111\/jsr.70410","type":"journal-article","created":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T12:43:17Z","timestamp":1783687397000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Associations Between Daytime Napping, Sleep Duration and Postoperative Delirium"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0438-0728","authenticated-orcid":false,"given":"Kyle","family":"Nameth","sequence":"first","affiliation":[{"name":"SUNY Upstate Medical University  Syracuse New York USA"},{"name":"Medical Biodynamics Center, Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital  Boston Massachusetts 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USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruixue","family":"Cai","sequence":"additional","affiliation":[{"name":"Medical Biodynamics Center, Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shahab","family":"Haghayegh","sequence":"additional","affiliation":[{"name":"Medical Biodynamics Center, Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital  Boston Massachusetts USA"},{"name":"Broad Institute of MIT and Harvard  Cambridge Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chenlu","family":"Gao","sequence":"additional","affiliation":[{"name":"Medical Biodynamics Center, Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital  Boston Massachusetts USA"},{"name":"Broad Institute of MIT and Harvard  Cambridge Massachusetts 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