Biostatistics & Study Design 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
- B2.0
- C4.0Correct answer
- D1.0
- E0.5
- F5.0
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