TY - JOUR
T1 - Dairy intake and incident functional disability among older Japanese adults
T2 - the Ohsaki Cohort 2006 Study
AU - Lu, Yukai
AU - Matsuyama, Sanae
AU - Sugawara, Yumi
AU - Sone, Toshimasa
AU - Tsuji, Ichiro
N1 - Funding Information:
IT designed and conducted research; YL analyzed data and wrote the paper; SM, YS, TS, and IT provided constructive suggestions; YS had primary responsibility for final content. All authors read and approved the final manuscript. YL received financial support from the Otsuka Toshimi Scholarship on the period of 2019–2022. The authors would like to thank Yoshiko Nakata for her technical assistance.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.
PY - 2022/8
Y1 - 2022/8
N2 - 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.
AB - 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.
KW - Activities of daily living
KW - Cheese
KW - Functional limitation
KW - Instrumental activities of daily living
KW - Milk
KW - Yogurt
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U2 - 10.1007/s00394-022-02843-w
DO - 10.1007/s00394-022-02843-w
M3 - Article
C2 - 35246747
AN - SCOPUS:85125588746
SN - 1436-6207
VL - 61
SP - 2627
EP - 2637
JO - Zeitschrift fur Ernahrungswissenschaft
JF - Zeitschrift fur Ernahrungswissenschaft
IS - 5
ER -