In a case-control study, how is the odds ratio interpreted?

In a case-control study, how is the odds ratio interpreted?

• A. The odds ratio estimates the odds of exposure among cases relative to controls and, under rare disease assumption, approximates the relative risk.
• B. The odds ratio is the same as the risk ratio in all study designs.
• C. The odds ratio measures the probability of disease given exposure.
• D. The odds ratio cannot be interpreted.

Answer: (A)