Problem
"A hypothetical cohort study of pesticide exposure and cancer followed exposed pesticide workers and a comparison group of non-exposed employees of the same company over a 30-year period. Researchers found that the incidence of cancer among exposed workers was 55.3 per 1,000. In the comparison cohort not exposed to pesticides, the incidence of cancer was 15.7 per 1,000. Calculate the relative and attributable risks of exposure to pesticides and the development of cancer.