Relationship of toothbrushing to metabolic syndrome in middle-aged adults

Akihiko Tanaka, Kenji Takeuchi, Michiko Furuta, Toru Takeshita, Shino Suma, Takashi Shinagawa, Yoshihiro Shimazaki, Yoshihisa Yamashita

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Aim: To examine the effect of toothbrushing on the development of metabolic syndrome (MetS), including assessment of periodontal status, in middle-aged adults. Methods: This 5-year follow-up retrospective study was performed in 3,722 participants (2,897 males and 825 females) aged 35–64 years who underwent both medical check-ups and dental examinations. Metabolic components included obesity, elevated triglycerides, blood pressure, fasting glucose and reduced high-density lipoprotein. Toothbrushing frequency was assessed using a questionnaire. Periodontal disease was defined as having at least one site with a pocket depth of ≥4 mm. Logistic regression analysis was performed to evaluate the relationship between toothbrushing frequency at the baseline examination and the development of MetS (≥3 components). Results: During follow-up, 11.1% of participants developed MetS. After adjusting for potential confounders including periodontal disease, participants with more frequent daily toothbrushing tended to have significantly lower odds of developing MetS (p for trend =.01). The risk of development of MetS was significantly lower in participants brushing teeth ≥3 times/day than in those brushing teeth ≤1 time/day (odds ratio = 0.64, 95% confidence interval = 0.45–0.92). Conclusions: Frequent daily toothbrushing was associated with lower risk of development of MetS.

Original languageEnglish
Pages (from-to)538-547
Number of pages10
JournalJournal of Clinical Periodontology
Issue number5
Publication statusPublished - May 2018

All Science Journal Classification (ASJC) codes

  • Periodontics


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