Exercise #3–Measures of Association:
The Excel notebook(“Exercise3.xls”), has a worksheet labeled as “Cohort Study”.
For the cohort study, I have given a hypothetical data table to evaluate the association, if any, between smoking and pneumonia among a cohort of subjects. Use the formulas given in the “Cohort Studies” module to calculate…
(1) – incidence among the “exposed” [those who smoked];
(2) – incidence among the “unexposed” [those who did not smoke];
(3) – relative risk (RR) of pneumonia among those who smoked,
versus those who did not;
(4) – attributable risk;
(5) – attributable fraction (AR%); and
(6) – Population Attributable Risk (PAR%).
Enter your answers in EX3 on blackboard.
Leave your answers as calculated (in decimals). That is, if you get an AR% of 0.2, just enter 0.2 as your answer; not 20%.
