A cohort of 3,400 people followed for 10 years, of whom 1,600 were exposed to a chemical and another 1,800 who were not exposed. As the outcome, the incidence of cases of myeloid leukemia was...

A cohort of 3,400 people followed for 10 years, of whom 1,600 were exposed to a chemical and another 1,800 who were not exposed. As the outcome, the incidence of cases of myeloid leukemia was measured. In the exposed group there were 100 cases and in the group without product exposure (25) cases in 10 years (prospective cohort study).

a. Prepare a contingency table

b. Compute and interpret the following:

b.1 Cumulative incidence

b.2 CI exposed and unexposed

b.3 Relative risk

b.4 Attributable risk

b.5 Attributable risk among the exposed