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Although the association between oral health and physical frailty is well established, the relationship between oral health and psychological frailty has not yet been investigated. Therefore, we conducted a cross\u2010sectional study to examine the association between maximal occlusal force and psychological frailty in Japanese community\u2010dwelling older adults.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Psychological frailty was defined as a World Health Organization\u20105 scale (WHO\u20105) score of &lt;13, cognitive and functional status was defined as a Japanese version of the Montreal Cognitive Assessment (MoCA\u2010J) score of &lt;23, and psychological robustness was defined as a WHO\u20105 score of \u226513 and a MoCA\u2010J score of \u226523. We used a cross\u2010sectional study design to measure maximal occlusal force in 1810 participants, and examined the following factors relevant to psychological frailty: educational level, financial status, living situation, history of chronic diseases, handgrip strength, and instrumental activities of daily living. We used propensity score matching to match the psychological frailty and psychological robustness groups according to demographic and confounding factors. This process, resulted in 344 participants, of whom 172 were in the psychological frailty group and 172 were in the psychological robustness group. In the matched cohort, differences between groups with and without psychological frailty were compared using generalized estimating equations for maximal occlusal force after adjusting for the number of teeth.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>After controlling for potential confounding factors of frailty, the psychological frailty group showed lower maximal occlusal force compared with the psychological robustness group (unstandardized regression coefficients\u00a0=\u00a0\u221272.7, 95% confidence interval: \u2212126.3 to \u221219.1).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Maximal occlusal force was associated with a reduced prevalence of psychological frailty among Japanese community\u2010dwelling older adults participating in our study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jgs.18239","type":"journal-article","created":{"date-parts":[[2023,1,24]],"date-time":"2023-01-24T02:03:32Z","timestamp":1674525812000},"page":"1819-1828","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Relationship between occlusal force and psychological frailty in Japanese community\u2010dwelling older adults: The Septuagenarians, Octogenarians, Nonagenarians Investigation with Centenarians study"],"prefix":"10.1111","volume":"71","author":[{"given":"Suzuna","family":"Akema","sequence":"first","affiliation":[{"name":"Department of Prosthodontics, Gerontology and Oral Rehabilitation Osaka University Graduate School of Dentistry  Osaka 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