{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:55:06Z","timestamp":1760234106200,"version":"build-2065373602"},"reference-count":45,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>There have been contradictory reports on the effects of vitamin D in the prevention of periodontitis. We analyzed the association between vitamin D status (levels of plasma 25(OH)D) and periodontitis using the Korea National Health and Nutrition Examination Survey (KNHANES) 2013\u20132014 database. Among the participants in the KNHANES (2013\u20132014), only those aged \u226560 years who completed a health interview survey, periodontal examination, and blood test were included in the study. Thus, data from 701 participants were used in the final analysis. Periodontal status was evaluated using the Community Periodontal Index (CPI), and periodontitis was defined as having a CPI score of 3 or 4. Plasma 25(OH)D levels were classified according to two criteria: 20 ng\/mL and quartile value. The chi-square test and multivariate logistic regression analyses were performed to analyze the prevalence of periodontitis according to plasma 25(OH)D levels. Univariate analyses showed that periodontitis was not significantly associated with plasma 25(OH)D levels. In the multivariate logistic regression model adjusted for sociodemographic characteristics, the difference in the prevalence of periodontitis between those with a normal range of 25(OH)D and those with low plasma of 25(OH)D levels was not statistically significant. Vitamin D intake has been reported to have benefits in maintaining periodontal health; however, total plasma 25(OH)D levels showed no significant association with periodontitis based on CPI scores in this study. Additionally, these findings reaffirmed the importance of toothbrushing and smoking cessation to prevent periodontitis in people aged \u226560 years.<\/jats:p>","DOI":"10.3390\/ijerph18084181","type":"journal-article","created":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T12:11:00Z","timestamp":1618488660000},"page":"4181","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Relationship between Vitamin D Deficiency and Periodontitis in Korean Adults Aged \u226560 Years: Analysis of Data from the Korea National Health and Nutrition Examination Survey (2013\u20132014)"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2347-5239","authenticated-orcid":false,"given":"Mi-Ra","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Dental Hygiene, Hanseo University, Seosan 31962, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0876-1352","authenticated-orcid":false,"given":"Su-Jin","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Dental Hygiene, College of Health Science, Gachon University, Incheon 21936, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hee-Eun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Dental Hygiene, College of Health Science, Gachon University, Incheon 21936, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4075-5163","authenticated-orcid":false,"given":"Jun-Seon","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Dental Hygiene, College of Health Science, Gachon University, Incheon 21936, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,15]]},"reference":[{"key":"ref_1","unstructured":"Eaton, K., and Ower, P. 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