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?
- A)8.0
- B)2.0
- C)4.0GABARITO
- D)1.0
- E)0.5
Explicação
Relative risk is calculated in cohort studies as incidence in the exposed divided by incidence in the unexposed. Night-shift workers have a risk of 40/200 = 0.20, and day-shift workers have a risk of 20/400 = 0.05; 0.20/0.05 = 4.0. The data therefore show a fo... Ver explicação completa e trilha adaptativa →