In epidemiology, person variables include:

A.Socioeconomic status

B.Race

C.Secular trends

D.A & B only

Random assignment of subjects to study groups helps to control for:

A.Directionality of exposure

B.Timing of data collection

C.Biases due to confounding

D.None of the above

Death certificate data in the United States include which of the following:

A.Demographic characteristics

B.Date and place of death

C.Cause of death

D.All of the above

In epidemiology, place variables include:

A.The localized occurrence of disease

B.Secular trends

C.Point epidemics

D.All of the above

Gradual changes in the frequency of diseases over long periods refer to as:

A.Cyclic trends

B.Point epidemics

C.Clustering

D.Secular trends

One of the following is an example of a relative measure of disease frequency in epidemiological studies:

A.Cumulative incidence

B.Incidence rate ratio

C.Prevalence difference

D.Population attributable risk