In populations with high infant mortality rates, LEB is highly sensitive to the rate of death in the first few years of life. For example, a society with a LEB of 40 would have relatively few people dying at exactly 40: most will die before 30 or after 55. A combination of high infant mortality and deaths in young adulthood from accidents, epidemics, plagues, wars, and childbirth, before modern medicine was widely available, significantly lowers LEB. Human remains from the early Bronze Age indicate an LEB of 24. National LEB figures reported by national agencies and international organizations for human populations are estimates of period LEB. Period LEB is the mean length of life of a hypothetical cohort assumed to be exposed, from birth through death, to the mortality rates observed at a given year. Cohort LEB is the mean length of life of a birth cohort (in this case, all individuals born in a given year) and can be computed only for cohorts born so long ago that all their members have died. The most commonly used measure is life expectancy at birth (LEB, or in demographic notation e 0, where e x denotes the average life remaining at age x). Human life expectancy is a statistical measure of the estimate of the average remaining years of life at a given age. The square of the bubbles is proportional to country population based on estimation of the UN. Open the original svg-file and hover over a bubble to show its data. Life expectancy and healthy life expectancy in various countries of the world in 2019, according to WHO Life expectancy and healthy life expectancy by sex Life expectancy development in some big countries of the world since 1960 Life expectancy at birth, measured by region, between 19 Life expectancy by world region, from 1770 to 2018 “Gender Die Gap”: global female life expectancy gap at birth for countries and territories as defined by WHO for 2019. ( November 2022) ( Learn how and when to remove this template message) Please help improve this article if you can. The specific problem is: Clarification needed at times. This article may require cleanup to meet Wikipedia's quality standards.
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