Suppose researchers conduct an analysis addressing the relationship between cigarette smoking and lung cancer in a group of employees at a work site with high exposures to asbestos. The following 2x2 tables address the relationship between lung the exposure and outcomes. Lung Cancer No Lung Cancer Total Current Smoker 218 40 258 Non-Smoker 293 395 688 Total 511 435 946 A) Calculate the relative risk measure for lung cancer based on exposure status. B) The researchers have found a consistent error in their questionnaire that misclassified 25% of irregular smokers as nonsmokers in the non-diseased group only. Create a new 2x2 table and calculate another relative risk for the outcome. C) Describe the difference between your two relative risk measures calculated in parts A and B.
Suppose researchers conduct an analysis addressing the relationship between cigarette smoking and lung cancer in a group of employees at a work site with high exposures to asbestos. The following 2x2 tables address the relationship between lung the exposure and outcomes.
|
|
Lung Cancer |
No Lung Cancer |
Total |
|
Current Smoker |
218 |
40 |
258 |
|
Non-Smoker |
293 |
395 |
688 |
|
Total |
511 |
435 |
946 |
A) Calculate the relative risk measure for lung cancer based on exposure status.
B) The researchers have found a consistent error in their questionnaire that misclassified 25% of irregular smokers as nonsmokers in the non-diseased group only. Create a new 2x2 table and calculate another relative risk for the outcome.
C) Describe the difference between your two relative risk measures calculated in parts A and B.
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