Posted: February 27th, 2023

__Exercise #3__

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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%.

Yes

No

Total

175

Pneumonia? | |||||||

Yes | No | Total | |||||

Smoker? | 110 | 330 | 440 | ||||

65 | 1 | 175 | 1240 | ||||

1505 | 1680 | ||||||

CALCULATE: | |||||||

Incidence in Exposed | |||||||

Incidence in Unexposed | |||||||

Relative Risk | |||||||

Attributable Risk | |||||||

Attributable Fraction | |||||||

Population Attributable Risk | |||||||

Enter your answers in EX3 on blackboard |

Place an order in 3 easy steps. Takes less than 5 mins.