5-years longitudinal study on dental health, oral function and quality of life

2012 Fiscal Year Final Research Report

• Project/Area Number: 22592148
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: Osaka University
• Principal Investigator: YOSHIDA Minoru 大阪大学, 大学院・歯学研究科, 招聘教員 (90263293)
• Co-Investigator(Kenkyū-buntansha): IKEBE Kazunori 大阪大学, 歯学部附属病院, 講師 (70273696)
• Project Period (FY): 2010 – 2012
• Keywords: 補綴歯科 / 高齢者 / 咬合力 / QOL / 縦断研究

Research Abstract

This study examined changes in oral health-related quality of life (OHRQoL) among Japanese elderly over a 7-year period. A sample of independently living individuals (aged 60+ years) underwent a questionnaire and dental examination at baseline and 7 years afterward. The Geriatric Oral Health Assessment Index (GOHAI) was used to assess the impact of oral conditions. Occlusal force and salivary flow were also assessed. Of the 411 participants assessed at baseline, 130 (31.6%) accepted to participate after 7 years. There were no significant differences between those lost to follow-up and those assessed at 7 years, except that a higher proportion of the latter rated their baseline general health as good. Among the latter, the overall mean GOHAI score did not change significantly (11.8 at baseline and 11.1 at follow-up; p = 0.16). However, after controlling for age, gender, and baseline GOHAI score, participants who had lost teeth or experienced a decline in occlusal force after 7 years had higher follow-up GOHAI scores (indicating poorer OHRQoL). Unfavorable changes in clinical oral status over time are reflected in poorer self-rated oral health.

Research Products

• [Journal Article] Determinants of change in oral health-related quality of life over 7 years among older Japanese. (2013)
  • Author(s): Enoki K, Ikebe K, Matsuda K, Yoshida M, Maeda Y, Thomson WM
  • Journal Title: J Oral Rehabil Volume: 40 Pages: 252-257
• [Presentation] 5年コホートにおける残存歯数が全身疾患罹患に及ぼす影響 (2012)
  • Author(s): 榎木香織,池邉一典,松田謙一,多田紗弥夏,村井俊介,岡田匡史,久留島悠子,魚田真弘,三原佑介,前田芳信
  • Organizer: 平成24年度日本補綴歯科学会中国・四国支部,九州支部合同学術大会
  • Place of Presentation: 広島市
  • Year and Date: 2012-09-01
• [Presentation] 7年間の縦断的研究による高齢者の口腔機能の変化とQOLとの関係. (2011)
  • Author(s): 榎木香織,池邉一典,松田謙一,吉田実,前田芳信
  • Organizer: 第120回日本補綴歯科学会学術大会
  • Place of Presentation: 広島市
  • Year and Date: 2011-05-20
• [Presentation] Longitudinal shifts in OHIP-14 among Japanese elderly in five years. (2010)
  • Author(s): Enoki K, Ikebe K, Matsuda K, Hazeyama T, Maeda Y.
  • Organizer: 88th IADR General Session.
  • Place of Presentation: Barcelona, Spain.
  • Year and Date: 2010-07-15