[Active life expectancy: factors influencing regional and gender differences]

Area of Science:

• Gerontology and Public Health
• Epidemiology of Aging
• Health Economics and Outcomes Research

Context:

• Understanding active life expectancy (ALE) is crucial for public health planning and assessing the quality of life in aging populations.
• Previous research indicates variations in ALE across different regions and genders, necessitating localized data collection and analysis.
• The study addresses the need for prospective data on functional longevity among the elderly, specifically focusing on disability-free life years.

Purpose:

• To estimate active life expectancy (ALE) values based on prospective observational data in Japanese elderly populations.
• To investigate and discuss the factors contributing to regional and gender-specific differences in ALE.
• To compare ALE estimates with international data, particularly from the United States, and analyze disability progression patterns.

Summary:

• Prospective observation of residents aged 65+ in Sendai City (1988-1991) revealed ALE of 14.7 years for men and 17.7 years for women at age 65, representing 91% and 87% of total life expectancy, respectively.
• Sendai's elderly demonstrated longer ALE and shorter durations of disability compared to American counterparts.
• Further analysis in Wakuya Town (1994-1996) across basic ADL, instrumental ADL (IADL), and mobility showed shorter ALE in IADL for both sexes, with men experiencing disability onset and progression earlier than women.

Impact:

• Provides valuable data on healthy life years for Japanese elderly, informing targeted interventions to promote functional independence.
• Highlights significant gender differences in disability onset and progression, suggesting the need for sex-specific aging health strategies.
• Offers a comparative perspective on aging health outcomes between Japan and the US, contributing to global gerontological research.