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5 terms

# Epidemiology Ch. 3

Ch 3- Epidemiology for Public Hth Practice, Robert H. Friss
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Proportion
type of ratio in which numerator is part of denominator. = A/(A+B) x 100
Ratio
value obtained by dividing one quantity by another. consists of numerator and denominator, but does not necessarily have relationship
Rate
numerator consists of the frequency of disease over specified period of time, denominator is unit size of population at specific point in time
Prevalence
number of existing cases of disease in a population at designated time
Incidence
rate of development of a disease in a group over a certain time period