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Daigo Yoshida Last modified date:2020.01.09

Assistant Professor / Department of Epidemiology and Public Health
Department of Basic Medicine
Faculty of Medical Sciences

Department of Epidemiology and Public health, Graduate School of Medical Sciences, Kyushu University .
Academic Degree
Master of Medical Science, PhD of Medical Science
Field of Specialization
Epidemiology, Public Health, Public Health Nursing
Research Interests
  • The risk score for incidence of ADL disability in a general Japanese elderly.
    keyword : Japanese elderly, ADL disability, risk score
  • Lifetime risk of dementia in a general population of Japanese elderly
    keyword : dementia, lifetime risk, general population of Japanese elderly
  • Dairy consumption and risk of functional disability in elderly Japanese population
    keyword : Dairy intake; functional disability; capacity impairment; ADL disability; the elderly; cohort studies; Japanese
  • Healthy life expectancy in a general Japanese population
    keyword : Healthy life expectancy
  • Prevalence and causes of functional disability in an elderly general population of Japanese: the Hisayama Study
    keyword : ADL disability, dementia, stroke, prevalence, Japanese elderly
Academic Activities
1. Yoshida D, Ohara T, Hata J, Shibata M, Hirakawa Y, Honda T, Uchida K, Takasugi S, Kitazono T, Kiyohara Y, Ninomiya T. , Dairy consumption and risk of functional disability in an elderly Japanese population: the Hisayama Study. , American Journal of Clinical Nutrition, 109, 6, 1664-1671, 2019.06, Background: Little is known about the association between dairy intake and risk of functional disability in the elderly.
Objectives: We examined the influence of dairy intake on the development of declining functional capacity and activities of daily living (ADL) in a prospective cohort study of an elderly population.
Methods: A total of 859 community-dwelling Japanese residents, aged ≥65 y without functional disability, were followed up for 7 y. Functional capacity impairment was defined as a TokyoMetropolitan Institute of Gerontology Index of Competence score of ≤12, and ADL disability was defined as a Barthel Index score of ≤95. Dairy intake was evaluated using a 150-item semiquantitative food frequency questionnaire, grouped into quartiles. The RR of dairy
intake on incident functional disabilitywas computed using a Poisson regression model.
Results: The multivariable-adjusted RR of impaired functional capacity decreased significantly with increasing dairy intake levels
(RR [95% CI]: quartile 1, 1.00 [reference]; quartile 2, 0.85 [0.71, 1.02]; quartile 3, 0.81 [0.68, 0.98]; and quartile 4, 0.74 [0.61, 0.90]; P-trend = 0.001). Regarding the three subscales of functional capacity, the inverse association between dairy intake
and risk for impairment of intellectual activity and social role remained significant (P-trend = 0.0009 and 0.02, respectively),but such an association was not observed for instrumental ADL.The multivariable-adjusted risk of ADL disability also decreased weakly but significantly with elevating dairy intake (P-trend=0.04). A similar association was seen for severity of functional disability (P-trend = 0.002). However, the magnitude of these associations was attenuated after further adjustment for protein intake.
Conclusion: Our findings suggest that higher dairy intake is associated with a lower risk of functional disability and its
progression in the elderly, probably via an increase in protein intake..