It is defined as the number of persons that die within a population at a given interval of time. It is associated with different types of terms like Crude mortality rate ,Age-specific mortality rate ,Infant mortality rate ,Maternal mortality rate and Under-5 mortality rate. Cancer , heart diseases, accidents, diabetes etc. are the most common causes of death .Mortality data can be used in explaining trends and differentials in overall mortality can act as Clue for epidemiological research ,and analysis of public health problems can be monitored .Incomplete reporting of death ,Lack of accuracy Lack of uniformity-hampers the national and international comparability are some of the limitations of mortality data.

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