Investigators study a rare cancer. They enroll 200 cases and 200 controls and ask about prior exposure. Exposure is found in 80 cases and 40

Question

Investigators study a rare cancer. They enroll 200 cases and 200 controls and ask about prior exposure. Exposure is found in 80 cases and 40 controls. They need the appropriate measure of association for this design. Which of the following is the most appropriate at this time?

Accepted Answer

Odds ratio

Answer

Risk difference

Answer

Relative risk

Answer

Number needed to treat

Answer

Incidence rate

Case-control odds ratio — USMLE Step 3 MCQ

Investigators study a rare cancer. They enroll 200 cases and 200 controls and ask about prior exposure. Exposure is found in 80 cases and 40 controls. They need the appropriate measure of association for this design. Which of the following is the most appropriate at this time?