Cause-specific death rates can be calculated in one of two ways from information provided by a post-census mortality survey and a national census. This simplest method is to apply the cause-specific mortality fractions from the survey to the death rates determined from the census. For example, if the post-census mortality survey determined that 20 percent of the population died from HIV/AIDS within a certain year and the census calculated the national crude death rate to be 14 per 1,000 population, 0.2*14 gives a cause-specific malarial death rate of 280 per 100,000 population.
Cause-specific death rates can also be calculated directly by dividing the number of people in the post-census mortality survey who died from a specific cause by the number of people residing in the sample area as reported on the census. For example, if the post-census mortality survey found that there were 2,800 malarial deaths in the sample and the census determined that there were one million people living in the sample area, 2,800/1,000,000 gives a malarial death rate of 280 per 100,000 population.
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