{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T17:14:37Z","timestamp":1788455677488,"version":"build-2803163510"},"reference-count":22,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T00:00:00Z","timestamp":1788134400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Int J Psychiatry Med"],"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To compare sleep quality, daytime sleepiness, and circadian rhythm characteristics across clinically defined chronic kidney disease (CKD) groups and to examine their relative contribution to global subjective sleep quality.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method<\/jats:title>\n                    <jats:p>This two-center, cross-sectional study enrolled 344 adults with CKD (response rate: 96.6%) from nephrology settings in Turkey. Participants were classified into three groups: mild-to-moderate CKD (KDIGO stages 2-3; n = 133), advanced CKD without dialysis (stages 4-5; n = 37), and dialysis-dependent CKD (stage 5D; n = 174). Sleep quality, daytime sleepiness, and circadian rhythm parameters were assessed using the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), and Munich Chronotype Questionnaire (MCTQ). Hierarchical regression identified predictors of PSQI global scores.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      ESS total scores were significantly higher in the dialysis-dependent group compared with both other groups (\u03b5\n                      <jats:sup>2<\/jats:sup>\n                      = 0.182, the only large effect size), whereas PSQI global scores were paradoxically lower in this group (adjusted\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.021). Biological chronotype (MSFsc) did not differ across groups. In hierarchical regression, ESS (\u03b2 = 0.525) and dialysis-dependent status (\u03b2 = \u22120.318) were the only significant predictors of PSQI global scores, with sleep\u2013wake variables adding 24.3% explained variance beyond demographic and clinical factors.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>CKD-related sleep\u2013wake burden is more prominently reflected in daytime sleepiness and social\u2013circadian disorganization than in global subjective sleep quality. Assessment of daytime sleepiness may improve recognition of sleep\u2013wake dysregulation in nephrology settings.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/00912174261485675","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T19:24:24Z","timestamp":1788204264000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Sleep Quality, Daytime Sleepiness, and Circadian Rhythm Characteristics in Chronic Kidney Disease: A Cross-Sectional Study Across Disease Stages"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-3084-8668","authenticated-orcid":false,"given":"Harun","family":"Yetkin","sequence":"first","affiliation":[{"name":"Department of Psychiatry, Erenk\u00f6y Mental and Nervous Diseases Training and Research Hospital"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mehmet Fatih","family":"Uzanulu","sequence":"additional","affiliation":[{"name":"Malatya Turgut \u00d6zal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Onur Sel\u00e7uk","family":"Yi\u011fit","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Ordu State Hospital"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zeynep Dilara","family":"Yetkin","sequence":"additional","affiliation":[{"name":"Department of Child and Adolescent Psychiatry, Erenk\u00f6y Mental and Nervous Diseases Training and Research Hospital, Istanbul, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u0130rem","family":"Dikilita\u015f","sequence":"additional","affiliation":[{"name":"Malatya Turgut \u00d6zal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3204-3437","authenticated-orcid":false,"given":"Hac\u0131 Mehmet","family":"\u00c7itil","sequence":"additional","affiliation":[{"name":"Malatya Turgut \u00d6zal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hac\u0131 Bayram","family":"Berkta\u015f","sequence":"additional","affiliation":[{"name":"\u0130n\u00f6n\u00fc University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mehtap","family":"Karaaslan","sequence":"additional","affiliation":[{"name":"\u0130n\u00f6n\u00fc University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,8,31]]},"reference":[{"key":"e_1_3_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.kisu.2021.11.003"},{"key":"e_1_3_6_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/ki.2013.77"},{"key":"e_1_3_6_4_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41581-024-00848-8"},{"key":"e_1_3_6_5_2","doi-asserted-by":"publisher","DOI":"10.1093\/ckj\/sfae279"},{"key":"e_1_3_6_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s40620-025-02214-8"},{"key":"e_1_3_6_7_2","doi-asserted-by":"publisher","DOI":"10.1159\/000321859"},{"key":"e_1_3_6_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/0165-1781(89)90047-4"},{"key":"e_1_3_6_9_2","doi-asserted-by":"publisher","DOI":"10.1093\/sleep\/14.6.540"},{"key":"e_1_3_6_10_2","doi-asserted-by":"publisher","DOI":"10.1177\/0748730402239679"},{"key":"e_1_3_6_11_2","doi-asserted-by":"publisher","DOI":"10.1080\/07420520500545979"},{"key":"e_1_3_6_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(07)61602-X"},{"issue":"4","key":"e_1_3_6_13_2","doi-asserted-by":"crossref","first-page":"S117","DOI":"10.1016\/j.kint.2023.10.018","article-title":"KDIGO 2024 clinical practice guideline for the evaluation and management of chronic kidney disease","volume":"105","author":"Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group","year":"2024","unstructured":"Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2024 clinical practice guideline for the evaluation and management of chronic kidney disease. Kidney Int. 2024;105(4S):S117-S314.","journal-title":"Kidney Int"},{"key":"e_1_3_6_14_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0158765"},{"issue":"2","key":"e_1_3_6_15_2","first-page":"107","article-title":"Pittsburgh Uyku Kalitesi \u0130ndeksi\u2019nin ge\u00e7erli\u011fi ve g\u00fcvenirli\u011fi [Validity and reliability of the Pittsburgh Sleep Quality Index]","volume":"7","author":"A\u011farg\u00fcn MY","year":"1996","unstructured":"A\u011farg\u00fcn MY, Kara H, Anlar \u00d6. Pittsburgh Uyku Kalitesi \u0130ndeksi\u2019nin ge\u00e7erli\u011fi ve g\u00fcvenirli\u011fi [Validity and reliability of the Pittsburgh Sleep Quality Index]. T\u00fcrk Psikiyatri Derg. 1996;7(2):107-115.","journal-title":"T\u00fcrk Psikiyatri Derg"},{"issue":"4","key":"e_1_3_6_16_2","first-page":"261","article-title":"Epworth Uykululuk \u00d6l\u00e7e\u011fi\u2019nin ge\u00e7erli\u011fi ve g\u00fcvenirli\u011fi [Validity and reliability of the Epworth Sleepiness Scale]","volume":"10","author":"A\u011farg\u00fcn MY","year":"1999","unstructured":"A\u011farg\u00fcn MY, \u00c7illi AS, Kara H, et al. Epworth Uykululuk \u00d6l\u00e7e\u011fi\u2019nin ge\u00e7erli\u011fi ve g\u00fcvenirli\u011fi [Validity and reliability of the Epworth Sleepiness Scale]. T\u00fcrk Psikiyatri Derg. 1999;10(4):261-267.","journal-title":"T\u00fcrk Psikiyatri Derg"},{"issue":"4","key":"e_1_3_6_17_2","first-page":"274","article-title":"Validity and reliability of the Turkish version of the munich chronotype questionnaire","volume":"33","author":"Erdo\u011fan \u015e","year":"2022","unstructured":"Erdo\u011fan \u015e, \u00dc\u00e7punar HK, Tavat BC. Validity and reliability of the Turkish version of the munich chronotype questionnaire. 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