Epidemiology The main reason for calculating life expectancy

Epidemiology

The main reason for calculating life expectancyis:

a-understand the future birth rate of the population

b-compliment vital statistics

c-promote the benefits of the national health interview survey

d- allof above

Solution

Answer: d- all of above

Life expectancy is the probable number of years that persons will live. It is determined statistically. Heredity, nutrition and health affect life expectancy. Life expectancy drives population growth rate. It helps determine the reproductive capability of a population.

Vital statistics give an indication about life expectancy. This helps to evaluate health care utilization and its benefits.