{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T18:31:25Z","timestamp":1790188285404,"version":"4.1.0"},"reference-count":42,"publisher":"BMJ","issue":"3","license":[{"start":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T00:00:00Z","timestamp":1741046400000},"content-version":"unspecified","delay-in-days":3,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"name":"NUS Department of Psychological Medicine","award":["R-177-000-100-001\/R-177-000-003-001"],"award-info":[{"award-number":["R-177-000-100-001\/R-177-000-003-001"]}]},{"name":"NUS iHeathtech Other Operating Expenses","award":["R-722-000-004-731"],"award-info":[{"award-number":["R-722-000-004-731"]}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open"],"accepted":{"date-parts":[[2025,2,17]]},"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>This study explored factors associated with sleep quality among medical students in Vietnam.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Design<\/jats:title>\n                  <jats:p>Cross-sectional study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Setting<\/jats:title>\n                  <jats:p>The study was conducted from December 2019 to February 2020 among medical students in Vietnam.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Participants<\/jats:title>\n                  <jats:p>Medical students were defined as those enrolled in undergraduate medical programmes. 1284 medical students who met the inclusion criteria participated in this study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Outcome measures<\/jats:title>\n                  <jats:p>The Pittsburgh Sleep Quality Index (PSQI) was used to measure participants\u2019 sleep quality, with a score of 5 or higher indicating poor sleep quality. Multivariable logistic and linear regression models were employed to identify the factors associated with poor sleep quality.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>36.6% of the study participants had poor sleep quality. There were statistically significant differences in the percentage of poor sleep quality across genders, health-related quality of life, morbidity status and depression (p&lt;0.05). Depression (Coef.=0.54, 95% CI 0.17, 0.91 and OR=1.50, 95% CI 1.13, 1.99) and any morbidity (Coef.=0.64, 95% CI 0.28, 0.99 and OR=1.44, 95% CI 1.09, 1.88) were factors associated with higher PSQI Score and increased risk of poor sleep quality. In contrast, higher health-related quality of life scores (EuroQOL-5 dimensions-5 Levels Index: OR=0.01; 95% CI 0.002, 0.03 and Coef.=\u22127.11; 95% CI \u22128.65, \u22125.56; and EuroQOL-Visual Analogue Scale: OR=0.99; 95% CI 0.98, 1.00 and Coef.=\u22120.03; 95% CI \u22120.04, \u22120.01) were related to lower PSQI Score and reduced risk of poor sleep quality.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>This study reveals that health conditions and psychological well-being were associated with sleep quality among medical students. Reducing stress, improving quality of life and improving morbidity have the potential to improve the sleep quality of medical students.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/bmjopen-2023-083168","type":"journal-article","created":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T19:05:45Z","timestamp":1741115145000},"page":"e083168","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":8,"title":["Factors associated with sleep quality among medical students in Vietnam: a national cross-sectional study"],"prefix":"10.1136","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4469-8485","authenticated-orcid":false,"given":"Cuong Tat","family":"Nguyen","sequence":"first","affiliation":[{"name":"Institute for Global Health Innovations, Duy Tan University, Da Nang, Vietnam"},{"name":"Faculty of Medicine, Duy Tan University, Da Nang, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vu Anh Trong","family":"Dam","sequence":"additional","affiliation":[{"name":"Institute for Global Health Innovations, Duy Tan University, Da Nang, Vietnam"},{"name":"Faculty of Medicine, Duy Tan University, Da Nang, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Long Hoang","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Department of Global Public Health, Karolinska Institute, Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dung","family":"Phung","sequence":"additional","affiliation":[{"name":"School of Public Health,The University of Queensland, Brisbane, Queensland, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tung Son","family":"Vu","sequence":"additional","affiliation":[{"name":"Institute of Health Economics and Technology, Hanoi, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huyen Phuc","family":"Do","sequence":"additional","affiliation":[{"name":"Institute of Health Economics and Technology, Hanoi, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thuc Minh Thi","family":"Vu","sequence":"additional","affiliation":[{"name":"Institute of Health Economics and Technology, Hanoi, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carl","family":"Latkin","sequence":"additional","affiliation":[{"name":"Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9629-4493","authenticated-orcid":false,"given":"Roger C M","family":"Ho","sequence":"additional","affiliation":[{"name":"Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore"},{"name":"Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cyrus S H","family":"Ho","sequence":"additional","affiliation":[{"name":"Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2025,3,4]]},"reference":[{"key":"2025101813123403000_15.3.e083168.1","doi-asserted-by":"publisher","DOI":"10.1097\/PSY.0b013e3181871405"},{"key":"2025101813123403000_15.3.e083168.2","doi-asserted-by":"publisher","DOI":"10.5665\/SLEEP.1150"},{"key":"2025101813123403000_15.3.e083168.3","doi-asserted-by":"crossref","DOI":"10.3390\/ijerph16224315","article-title":"Factors Associated with Sleep Disorders among Methadone-Maintained Drug Users in Vietnam","volume":"16","author":"Le","year":"2019","journal-title":"Int J Environ Res Public 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