epidemiology test 1
at least two conditions must be met to calculate a cumulative incidence, a perfect cohort and fixed follow- up
false
if you're conducting a study with a long follow-up period, it is probably more appropriate to calculate a cumulative incidence (CI), rather than an incidence density (ID)
false
william far is known for linking a cholera outbreak to the local water pump
false
can be measured as a rate or proportion
incidence
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prevalence of the disease will increase
all of the following reflect a descriptive epidemiologic study EXCEPT
provides answers to the WHY questions
the numerator is the: # of men in the U.S who died from heart disease in 2009. The denominator is the # of men in the U.S population, mid-year in 2009. The fraction is a:
rate
the numerator is the # of men in the U.S who died from heart disease in 2009. the denominator is the # of men in the U.S who died from cancer in 2009. the fraction is a
ratio
consider a hypothetical cohort in which 12 events occur, and the follow-up time for all individuals is 500 person-days. the incidence density, in person-days, is 24/1000 person-days
true
case-fatality rate
used as a measure of disease severity and to predict disease course or outcome number of cause-specific deaths among the incident cases x 10^n/ total number of incident cases