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Disease specific Death Rates
# death due to spc disease /Population at risk

Crude Death Rates
# death in pop during the year / Average population size

Rates
 •Rate is a proportion that is
 specified in time, thus a rate for disease would be

Proportions
 •A proportion is a ratio where the numerator “a” is part
 of the denominator

Ratio
 •A ratio is made of 2 elements, the numerator “a” and
 the denominator “b”.

Age specific Death Rates
# death among persons in a given age group / Population size in given age group

Case Fatality Rate
# death due to spc disease / Total number of people with disease

Proportionate Mortality
# death due to spc disease/ Total number of death from all diseases

Maternal Mortality Rate
# death due to puerperal causes / Total number of live births

Incidence Rate =
# NEW cases of disease / population at Risk of disease

Prevalence Rate =
# EXISITING cases of disease / TOTAL population

Crude Birth Rate =
# live births / Total Population

General Fertility Rate
# live births / Total # of women in childbearing age