A measurement calculated by the number of new cases during a period divided by the number of subjects at risk in the population at the beginning of the study:Cumulative incidenceA measurement that compares the incidence of disease (risk) among the exposed with the incidence of disease (risk) among the non-exposed ("reference") by means of ratio:Relative riskWhen considering relative risk, the reference (non-exposed) group assumes a value of _______ :1.0 (the "null" value)This measurement can be thought of as a ratio of 2 proportions (think of these as fractions of fractions):Risk ratio
e.g. (10/840)/(16/2,240) exposed vs. non-exposed