Trends and determinants of Japanese health expectancies

2016 Fiscal Year Final Research Report

• Project/Area Number: 25293121
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Medical sociology
• Research Institution: Nihon University
• Principal Investigator: SAITO Yasuhiko 日本大学, 総合科学研究所, 教授 (00277485)
• Co-Investigator(Kenkyū-buntansha): 中村 二朗 日本大学, 総合科学研究所, 教授 (30127112) ; 那須 郁夫 日本大学, 松戸歯学部, 教授 (80112952)
• Research Collaborator: Crimmins Eileen School of Gerontology University of Southern, Professor ; Robine Jean-Marie INSERM, Senior Researcher ; Jagger Carol Newcastle University, Professor ; Brouad Nicolas INED, Senior Researcher ; TAKAGI Emiko Towson University, Department of Health Science, Assistant Professor ; Hagedorn Aaron School of Gerontology University of Southern, Research Assistant Professor ; SUGAWARA Yuka (MINAGAWA Yuka) 上智大学, 国際教養学部, 助教 ; Tareque Ismail Rajshahi University, Associate Professor ; Davarian Shieva University of Southern, Researcher ; Chiu Chi-Tsun Institute of European and American Studies Academia Sinica, Research Fellow ; Levine Morgan E. University of Southern, Researcher
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 健康状態別余命 / 縦断調査 / 日本人高齢者 / 多相生命表

Outline of Final Research Achievements

We examined trends in healthy life expectancy at age 20 based on self-rated health responses between 2004 and 2013 in Japan. Both life expectancy and healthy life expectancy at age 20 have increased about a year for both men and women over this time-period. However, the proportion of healthy life expectancy to total life expectancy has not changed significantly over this time. We also computed disability-free life expectancy for ages 20 to 64, where any limitation of activities was the definition of disability. We found that partial life expectancy and partial disability-free life expectancy have increased slightly. However, the proportion of disability-free life expectancy has not changed much. Based on these results, we may conclude that Japan is experiencing dynamic equilibrium in population health, with approximately equal increases in expected years lived both disability-free and with activity limitation.

Free Research Field

人口学