Mortality refers to the number or rate of deaths that occur in a population.
Mortality can be reported in terms such as a crude rate, specific rate, adjusted rate, and proportionate mortality ratio. Data below are presented in crude death rates. Crude death rates are calculated by dividing the number of deaths from a specific disease by the number of people in the population. Crude death rates should only be compared to a population with a similar age distribution. In such cases that the age distributions of two or more population are not similar, age-adjusted rates should be calculated.