مقایسهٔ روش‌ها

	Healthy Life Expectancy	Sullivan Method
حوزه	جمعیت‌شناسی	جمعیت‌شناسی
خانواده	Survival analysis	Survival analysis
سال پیدایش	1971	1971
پدیدآور	Daniel F. Sullivan (Sullivan method); developed by the WHO/REVES tradition	Daniel F. Sullivan
نوع	Health-expectancy estimator partitioning life expectancy into healthy and unhealthy years	Prevalence-based health expectancy estimator
منبع بنیادین	Sullivan, D. F. (1971). A single index of mortality and morbidity. HSMHA Health Reports, 86(4), 347–354.	Sullivan, D. F. (1971). A single index of mortality and morbidity. HSMHA Health Reports, 86(4), 347–354.
نام‌های دیگر	HALE, Health-Adjusted Life Expectancy, Disability-Free Life Expectancy	Sullivan's Index, Sullivan Health Expectancy Method, Prevalence-Based Health Expectancy, Sullivan Yöntemi
مرتبط	4	4
خلاصه	Healthy life expectancy partitions ordinary life expectancy into the years a person can expect to live in good health and the years expected to be lived with disability or ill health. Building on the life table, the classic Sullivan method weights each age interval's person-years by the prevalence of good health, so the resulting expectancy answers not just 'how long will people live?' but 'how many of those years will be healthy?'. It has become a headline summary of population health, reported by the World Health Organization as HALE and tracked alongside life expectancy to judge whether longer lives are also healthier lives.	The Sullivan method is a simple, widely used technique for estimating health expectancy — the average number of years a person can expect to live in a given health state, such as free of disability. Introduced by Daniel Sullivan in 1971, it combines an ordinary period life table with the observed age-specific prevalence of the health state, partitioning life-table person-years into healthy and unhealthy years without requiring any longitudinal transition data.