What is the term for the average age of death for members of a population?
|
Life expectancy refers to the number of years a person is expected to live based on the statistical average. Life expectancy varies by geographical area and by era. In the Bronze age, for example, life expectancy was 26 years, while in 2010, it was 67 years. Show In mathematical terms, life expectancy refers to the expected number of years remaining for an individual at any given age. In formulaic terms, life expectancy is denoted by ex, where, “e” represents the expected number of years remaining and “x” represents the person’s present age. The life expectancy for a particular person or population group depends on several variables such as their lifestyle, access to healthcare, diet, economical status and the relevant mortality and morbidity data. However, as life expectancy is calculated based on averages, a person may live for many years more or less than expected. The concept of life expectancy is also applied in ecological studies. Whether life expectancy is being calculated for plants, animals or humans, tables referred to as actuarial tables or mortality tables are used. Taking humans as an example, these tables can predict how likely it is that a person of a given age will die before their next birthday. From here, several points can be can be calculated, including:
The oldest age any human has been known to live to is 122 years, the age reached by Jeanne Calment form France. This is referred to as the “maximum life span,” which is the maximum number of years that any human is known to have lived for. The life expectancy in Swaziland is 49.4 years, while in Japan it is 82.6 years. However, the figure for Japan may be slightly increased due to many infant deaths being counted as stillbirths. In most developing countries such as India and many other Southeast Asian countries, the number of infant deaths is responsible for lowering the overall life expectancy. However, an article published in the “Lancet” suggested that the life expectancy in Japan may be due to factors such as diet, public health and equal opportunities. Further Reading
Last Updated: Feb 26, 2019  Written by Dr. Ananya MandalDr. Ananya Mandal is a doctor by profession, lecturer by vocation and a medical writer by passion. She specialized in Clinical Pharmacology after her bachelor's (MBBS). For her, health communication is not just writing complicated reviews for professionals but making medical knowledge understandable and available to the general public as well. CitationsPlease use one of the following formats to cite this article in your essay, paper or report:
Suggested Reading
What is called life span?Lifespan is defined as the maximum number of years that a human can live, while life expectancy is the average total number of years that a human achieves [5].
What do you mean by life expectancy rate?Definition Life expectancy at a given age represents the average number of years of life remaining if a group of persons at that age were to experience the mortality rates for a particular year over the course of their remaining life.
How is average life expectancy calculated?Life expectancy is calculated by constructing a life table. A life table incorporates data on age-specific death rates for the population in question, which requires enumeration data for the number of people, and the number of deaths at each age for that population.
What is life expectancy vs lifespan?While both terms relate to the number of living years, they actually define very different concepts. While the term lifespan refers to the maximum number of years an individual can live, life expectancy refers to an estimate or an average number of years a person can expect to live.
|
