Epidemiology & Prevention USMLE Step 1 Practice Question
A prospective cohort study follows 200 night-shift workers and 400 day-shift workers for 5 years to assess new onset hypertension. By the end of follow up, 40 night-shift workers and 20 day-shift workers develop hypertension. Which of the following is the relative risk of hypertension for night-shift workers compared with day-shift workers?
Answer choices
- A8.0
- B1.0
- C0.5
- D4.0Correct answer
- E2.0
- F0.25
See the full explanation
Get the correct-answer rationale, why each distractor is wrong, the underlying mechanism, and high-yield associations — plus adaptive practice that targets your weak areas — with a free MedBoardPRO account.