Statistics>> Measurement of Mortality
From demographic point of view, mortality denotes the fall in size of population on account of death. Study of mortality and its measurement is not only important from the demographic analysis but also from the point of health standard to achieve better health facilities.
The mortality conditions of a population are studied by measuring the following mortality rates:
(我)Crude Death Rate (CDR)
CDR is a measure of the fall in population which takes place as a result of death. "COR may be defined as the ratio of the number of deaths which occur within a population during a specified year to the size of that population at mid year". David M. Heer. The following formula is used to estimate the C.O.R.
C.D.R. = ({D/{P )× 1000
where {D = Total death in a given region at a given time.
{P = Total mean population of the same region during the given time.
Merits:
it is very easy and as such can be understood easily by a common man. It is the simplest method of finding out death rate because it requires only the total population and number of deaths. It is a probability rate.
Demerits:
The most serious drawback of C.D.R. is that it does not consider the age and sex distribution of the population. We all know that mortality varies from age to age e.g. the death rate is high in infants and old persons, but C.D.R. completely ignores this fact. C.D.R, is not suitable for comparing mortality conditions of two different regions since the population structure of two different regions are not generally alike.
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