Adherence to the food-based Japanese dietary guidelines and prevalence of poor oral health-related quality of life among older Japanese adults in the Kyoto-Kameoka study

Daiki Watanabe*, Kayo Kurotani, Tsukasa Yoshida, Hinako Nanri, Yuya Watanabe, Heiwa Date, Aya Itoi, Chiho Goto, Kazuko Ishikawa-Takata, Takeshi Kikutani, Mitsuyoshi Yoshida, Hiroyuki Fujita, Yosuke Yamada, Misaka Kimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Although better diet quality is inversely related to the risk of geriatric disorders, the association of adherence to dietary guidelines with oral health-related quality of life (OHRQoL) is unclear. We aimed to investigate this association in older Japanese adults. This cross-sectional study included 7,984 Japanese participants aged ≥65 years from the population-based Kyoto-Kameoka study. Dietary intake was estimated using a validated self-administered food frequency questionnaire. The scores for adherence to the Japanese Food Guide Spinning Top (range: 0 [worst] to 80 [best]) were calculated. These scores were stratified into quartiles (Qs). Poor OHRQoL was defined as a score ≤ 50 using a 12-item Geriatric Oral Health Assessment Index. The odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using multivariable logistic regression and the spline model. Higher adherence score was associated with a lower prevalence of poor OHRQoL (Q1-Q4: 36.0%, 32.1%, 27.9%, and 25.1%, respectively). An inverse association was found between the score for adherence to the food-based Japanese dietary guidelines and the ORs of poor OHRQoL among all the participants (Q1: reference; Q2: OR, 0.87 [95% CI: 0.75-1.00]; Q3: OR, 0.77 [95% CI: 0.66-0.90]; Q4: OR, 0.72 [95% CI: 0.62-0.85]; p for trend < 0.001). These relationships were similar to the results in the spline model. Higher adherence to the food-based Japanese dietary guidelines is inversely associated with the prevalence of poor OHRQoL in older adults. Our results may provide useful insights to improve and maintain oral health.

Original languageEnglish
JournalBritish Journal of Nutrition
DOIs
Publication statusAccepted/In press - 2021
Externally publishedYes

Keywords

  • cross-sectional study
  • diet quality
  • Japanese Food Guide Spinning Top
  • older adults
  • oral health-related quality of life

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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