{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T05:00:27Z","timestamp":1790744427865,"version":"4.1.0"},"reference-count":51,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Public Health"],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Periodontitis is a chronic inflammatory condition influenced by behavioral, systemic and socioeconomic factors, and its prevalence increases with age. Although cross-sectional studies suggest an association between short sleep duration and periodontitis, longitudinal evidence remains limited. This study aimed to examine the association between sleep duration and self-reported incident severe periodontitis using data from a nationwide prospective cohort.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a prospective cohort study using longitudinal data from the 2023\u20132025 waves of the Japan COVID-19 and Society Internet Survey. Participants without self-reported severe periodontitis at baseline were followed for self-reported incident severe periodontitis. Short sleep duration was defined as &amp;lt;6\u202fh per night. Cox proportional hazards models were used as the primary analysis, and generalized estimating equations were used as a secondary analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Among 33,000 respondents to the 2023 survey, 8,144 individuals without self-reported severe periodontitis at baseline and with follow-up data were included in the study population. Short sleep duration was reported by 22.7% of participants and was associated with a higher risk of self-reported incident severe periodontitis (hazard ratio\u202f=\u202f1.28, 95% confidence interval [CI]: 1.13\u20131.46). This association was consistent in the secondary analysis using repeated measures (odds ratio\u202f=\u202f1.26, 95% CI: 1.09\u20131.46). Older age, lower income, diabetes, dyslipidaemia, depression and smoking were also associated with an increased risk.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Short sleep duration may be a modifiable risk factor for self-reported incident severe periodontitis in the general population. The present findings highlight the potential importance of sleep for the prevention of periodontitis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fpubh.2026.1946230","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T04:45:22Z","timestamp":1790743522000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Short sleep duration and incident self-reported severe periodontitis among Japanese adults: a nationwide prospective cohort study"],"prefix":"10.3389","volume":"14","author":[{"given":"Noriko","family":"Takeuchi","sequence":"first","affiliation":[{"name":"Department of Preventive Dentistry, Division of Dentistry, Medical Development Field, Okayama University","place":["Okayama, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kanon","family":"Itoi","sequence":"additional","affiliation":[{"name":"Dental School, Okayama University","place":["Okayama, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takayuki","family":"Maruyama","sequence":"additional","affiliation":[{"name":"Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University","place":["Okayama, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Tabuchi","sequence":"additional","affiliation":[{"name":"Division of Epidemiology, School of Public Health, Tohoku University Graduate School of Medicine","place":["Sendai, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daisuke","family":"Ekuni","sequence":"additional","affiliation":[{"name":"Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University","place":["Okayama, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"9","DOI":"10.1111\/j.1600-0757.1997.tb00189.x","article-title":"The pathogenesis of human periodontitis: an introduction","volume":"14","author":"Page","year":"1997","journal-title":"Periodontol, 2000"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"S68","DOI":"10.1111\/jcpe.12940","article-title":"Periodontal health and gingival diseases and conditions on an intact and a reduced periodontium: consensus report of workgroup 1 of the 2017 world workshop on the classification of periodontal and peri-implant diseases and conditions","volume":"45","author":"Chapple","year":"2018","journal-title":"J Clin Periodontol"},{"key":"ref3","doi-asserted-by":"publisher","first-page":"211","DOI":"10.1111\/j.1600-051X.2009.01517.x","article-title":"Prevalence of periodontal disease and treatment 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