Impact of oral self-care on incident functional disability in elderly Japanese: The Ohsaki Cohort 2006 study

Shino Bando, Yasutake Tomata, Jun Aida, Kemmyo Sugiyama, Yumi Sugawara, Ichiro Tsuji

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objectives To assess whether oral self-care (tooth brushing, regular dental visits and use of dentures) affects incident functional disability in elderly individuals with tooth loss. Design A 5.7-year prospective cohort study. Setting Ohsaki City, Japan. Participants 12 370 community-dwelling individuals aged 65 years and older. Primary outcome measures Incident functional disability (new long-term care insurance certification). Results The 5.7-year incidence rate of disability was 18.8%. In comparison with participants who had ≥20 teeth, the HRs (95% CIs) for incident functional disability among participants who had 10-19 and 0-9 teeth were 1.15 (1.01-1.30) and 1.20 (1.07-1.34), respectively (p trend<0.05). However, the corresponding values for those who brushed their teeth ≥2 times per day were not significantly higher in the '10-19 teeth' and '0-9 teeth' groups (HRs (95% CI) 1.05 (0.91-1.21) for participants with 10-19 teeth, and 1.09 (0.96-1.23) for participants with 0-9 teeth), although HRs for those who brushed their teeth <2 times per day were significantly higher (HRs (95% CI) 1.32 (1.12-1.55) for participants with 10-19 teeth, and 1.33 (1.17-1.51) for participants with 0-9 teeth). Such a negating association was not observed for other forms of oral self-care. Conclusions Tooth brushing may partially negate the increased risk of incident functional disability associated with having fewer remaining teeth.

Original languageEnglish
Article numbere017946
JournalBMJ open
Volume7
Issue number9
DOIs
Publication statusPublished - 2017 Sep 1

Keywords

  • Dental Visit
  • Denture
  • Disability
  • Teeth
  • Tooth-brushing

ASJC Scopus subject areas

  • Medicine(all)

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