Which describes relative risk?
A) Incidence among those exposed/incidence rate among those not exposed
B) Odds of having the condition when the suspected factor is present/odds of having the condition when not exposed to the factor
C) Measures the difference between the incidence rates for those exposed and those not exposed to the risk factor
D) Identifies whether those in the exposed group will develop the disease or condition when compared with those not exposed
Ans: A
The relative risk expresses the risk ratio of the incidence rate of those exposed and those not exposed to the suspected factor. Odds ratio is a simple mathematical ratio of the odds in favor of having a specific health condition when the suspected factor is present and the odds in favor of having the condition when the factor is absent. Attributable risk measures the difference between the incidence rates for those exposed and those not exposed to the risk factor. Relative risks and odds ratios provide a point estimate (a number) that identifies whether those in the exposed group will develop the disease or condition when compared with those not exposed.
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