Note: Cost per vote is the total amount raised by the candidate divided by the number of he or she received in the election. 1  The New York Times, Donald Trump Selects Senator Jeff Sessions for Attorney General, November 18, 2016. 2  Alabama GOP, 2016 Republican National Convention Delegates, accessed April 11, 2016.
Incidence. The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time. The formula for calculating an incidence rate is: 1  The numerator (x). 2  should include only new cases of the disease that occurred during the specified period.
The incidence rates for exposed and non-exposed subjects are calculated separately. The measure of association between exposure and disease in cohort studies is the relative risk. The relative risk is the ratio of the incidence. rate of index subjects to that of control subjects. A relative risk of 1.0 signifies that the incidence rate is the same among exposed and non-.