The number of new and old cases of a disease in a population in a given period of time, divided by the total number in that population is the: Incidence rate Attack rate Prevalence rate Crude rate
The number of new and old cases of a disease in a population in a given period of time, divided by the total number in that population is the prevalence rate.
Incidence rate is the number of new cases per population at risk in a given time period.
Attack rate is number of new cases among the population during the period divided by population at the risk at the beginning of the period.
Crude rate is the number of deaths occurring among the population of a given geographical area during a given year, per 1,000 mid-year total population of the given geographical area during the same year.
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