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2006 Fiscal Year Final Research Report Summary

Effects of the nutritional improvement resulting from a long-term intervention on life expectancy and active-life expectancy in a large-scale community-living elderly population

Research Project

Project/Area Number 15500504
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied health science
Research InstitutionUniversity of human arts and sciences (2005-2006)
Tokyo Metropolitan Institute of Gerontology (2003-2004)

Principal Investigator

KUMAGAI Shu  University of human arts and sciences, Department of health and nutrition, professor, 人間科学部, 教授 (80260305)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Yuko  Tokyo Metropolitan Institute of Gerontology, researcher, 福祉振興財団東京都老人総合研究所, 研究員 (30321871)
Project Period (FY) 2003 – 2006
Keywordsnutritional improvement / intervention / albumin / all-cause mortality / senior citizens / Cox-proportional hazard model / 観察研究
Research Abstract

Objective : The purpose of the study is to examine effects of the nutritional improvement resulting from a four-year community-directed intervention on the risk of all-cause mortality in the functionally competent community-living senior citizens. Design : a ten-year follow-up study. Setting and methods : The study population was a representative sample of functionally competent seniors aged≧65 years (243 men, 386 women, mean age : 71.0 years) living in a rural area (Nangai village, Northern Japan). The population showed a significant increase of albumin level (4.11g/dL → 4.27g/dL) resulting from a four-year nutritional intervention (from 1996 to 2000). The population was divided into three-group based on level of change in albumin (t alb) over the intervention period ; Group 1 : 0.0g/dL (25 percentile) ≦ Δalb, Group2 ; 0.0g/dL < Δalb < +0.3g/dL (75 percentile), Group3 ; +0.3g/dL ≦ Δalb. Risks of all-cause mortality of the three groups over the 6-year (from 2000 to 2006) of the post-intervention was assessed, using the Cox proportional hazard model. Results : Over the 6-year of follow-up, 88(14.0%) men and women died. The risk of all-cause mortality was inversely associated with increase level of albumin over the intervention period, The multivariate hazard ratios were 1.00 (reference) for group1, 0.69 (95% confidence interval [CI], 0.42-1.12) for group2, 0.47 (0.24-0.90) for group3, adjusting for sex, age, albumin level at 1996 year, high-level functional capacity at 2000 year, exercise habits, stroke, heart disease, diabetes, smoking, drinking. Conclusions : The results suggested that intervention for enhancing nutritional status reduced the risk of all cause mortality in the functionally competent community-living senior citizens. The intervention of nutritional enhancement may postpone aging in the elderly
people.

  • Research Products

    (11 results)

All 2007 2006 2005 2004

All Journal Article (8 results) Book (3 results)

  • [Journal Article] 自立高齢者の老化そのものに着目した栄養管理2007

    • Author(s)
      熊谷修
    • Journal Title

      Geriatric Medicine 45,3

      Pages: 301-305

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 高齢者の栄養問題とその解決策 -その科学的背景2006

    • Author(s)
      熊谷修
    • Journal Title

      臨床栄養 109,5

      Pages: 618-624

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 自立高齢者のための栄養改善プログラム2006

    • Author(s)
      熊谷修
    • Journal Title

      老年社会科学 28,3

      Pages: 387-392

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Risk factors for dietary variety decline among Japanese elderly in a rural community : a 8-year follow-up study from TMIG-LISA.2006

    • Author(s)
      Kwon J, Suzuki T, Kumagai S, et al.
    • Journal Title

      European Journal of Clinical Nutrition 60

      Pages: 305-311

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Factors associated with initiation and maintenance of physical activity among rural community-dwelling elderly.2006

    • Author(s)
      Yoshida Y, Kumagai S, et al.
    • Journal Title

      Jpn. J. Gerontology 28

      Pages: 348-358

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Predictors of nutritional decline in well-nourished community-living elderly people.2005

    • Author(s)
      Kumagai S. et al.
    • Journal Title

      Jpn.J. Nutr. Diet. 63

      Pages: 83-88

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of exercise adherence on longitudinal change in heart rate among community dwelling elderly.2005

    • Author(s)
      Yoshida Y, Kumagai S, et al.
    • Journal Title

      Jpn. J. Phys. Fitness. Sports. 54

      Pages: 295-304

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] An intervention study to improve the nutritional status of functionally competent community living senior citizens.2004

    • Author(s)
      Kumagai S. et al.
    • Journal Title

      Geriatrics and Gerontology International 3

      Pages: s21-26

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 最新栄養予防治療学2006

    • Author(s)
      熊谷修
    • Total Pages
      52-62
    • Publisher
      永井書店
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] アクティブシニア社会の食品開発指針2006

    • Author(s)
      熊谷修
    • Total Pages
      160-171
    • Publisher
      サイエンスフォーラム社
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 栄養改善のアクティビティ2006

    • Author(s)
      熊谷修
    • Total Pages
      1-79
    • Publisher
      ひかりのくに
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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