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Linear regression models were used to assess the associations between DII (exposure) and log\u2010transformed PISA (outcome) calculated from full\u2010mouth periodontal examinations. Restricted cubic spline (RCS) models were applied to examine potential nonlinearity.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among the 466 participants (mean age\u2009=\u200973.1\u2009years), the median PISA was 37.8\u2009mm\n                      <jats:sup>2<\/jats:sup>\n                      , and the median values for whole\u2010mouth average probing pocket depth, clinical attachment loss and bleeding on probing were 1.8\u2009mm, 2.0\u2009mm and 3.3%, respectively. After adjustment for covariates, participants in the third [regression coefficient (95% confidence interval)\u2009=\u20090.49 (0.03\u20130.95)] and fourth [0.83 (0.34\u20131.32)] DII quartiles had significantly higher PISA values. Although the test for nonlinearity was not significant, the RCS analysis revealed a largely flat association below DII\u2009\u2248\u2009\u22121.5, followed by a near\u2010linear increase with increasing DII.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Diets with greater inflammatory potential were associated with higher periodontal inflammatory burdens among older adults in Japan. DII may serve as a modifiable dietary indicator to support periodontal health in ageing populations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jcpe.70140","type":"journal-article","created":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T00:25:48Z","timestamp":1778804748000},"page":"1312-1322","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Dietary Inflammatory Index and Periodontal Inflammation in Community\u2010Dwelling Older Adults in Japan: The Otassha Study"],"prefix":"10.1111","volume":"53","author":[{"given":"Akihiro","family":"Yuguchi","sequence":"first","affiliation":[{"name":"Division of Dental Public Health, Department of Oral Health Science Graduate School of Dental Medicine, Hokkaido University  Hokkaido 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