Dairy intake and incident functional disability among older Japanese adults: the Ohsaki Cohort 2006 Study

Yukai Lu, Sanae Matsuyama, Yumi Sugawara, Toshimasa Sone, Ichiro Tsuji

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Purpose: Previous studies have investigated the association between dairy intake and functional disability, but their results were inconsistent. Our study aimed to investigate whether dairy intake may protect against incident functional disability among Japanese older adults. Methods: We conducted a longitudinal analysis of dairy intake with incident functional disability in a prospective cohort study of 11,911 Japanese individuals aged ≥ 65 years who were followed up for 8.2 years on average. Data on milk, yogurt, and cheese intake were collected using a validated food frequency questionnaire. Total dairy intake was the sum of the daily intake of milk, yogurt, and cheese, which was sex-specifically categorized in quintiles. Data on functional disability were retrieved from the public Long-term Care Insurance database. The Cox proportional hazards model was used to estimate the multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (95%CIs) for incident functional disability. Results: During 97,234 person-years of follow-up, 4874 persons (40.9%) were ascertained as having functional disability. Our study suggested a null association between total dairy intake and incident risk of functional disability; compared to Q1 (the lowest quintile) group, the multivariable-adjusted HRs (95%CIs) were 0.96 (0.88–1.05) for Q2, 0.93 (0.85–1.02) for Q3, 0.93 (0.85–1.02) for Q4, and 1.01 (0.92–1.10) for Q5 (p-trend = 0.840). We did not find any associations between milk, yogurt, or cheese intake and incident risk of functional disability. Conclusion: We found no evidence showing that dairy intake was associated with functional disability among Japanese older adults.

Original languageEnglish
Pages (from-to)2627-2637
Number of pages11
JournalEuropean Journal of Nutrition
Volume61
Issue number5
DOIs
Publication statusPublished - 2022 Aug

Keywords

  • Activities of daily living
  • Cheese
  • Functional limitation
  • Instrumental activities of daily living
  • Milk
  • Yogurt

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