특정 연도에 특정 연령의 사람이 앞으로 생존할 것으로 기대되는 평균 생존연수를 말한다.
특정 연도에 특정 연령의 사람이 앞으로 생존할 것으로 기대되는 평균 생존연수를 말한다(통계청 인구동향과)
통계청 사회통계국 인구동향과(생명표)
- Life expectancy at a certain age is the mean additional number of years that a person of that age can expect to live, if subjected throughout the rest of his or her life to the current mortality conditions (age-specific probabilities of dying, i.e. the death rates observed for the current period).
Life expectancy being expressed as the number of years persons of different ages may expect to live, starting from age zero, life expectancy at birth is the mean number of years a newborn child can expect to live if subjected throughout his or her life to the current mortality conditions, the probabilities of dying at each age.
Any later age can also be chosen as a starting point; the total expected life span is then this age plus the life expectancy at that age, the number of years a person of that age may expect to live if mortality patterns stay unchanged. Life expectancy is normally calculated separately for all age levels, as well as for males, females and the total population.