Problem
A 20-year study of British male physicians noted that the proportion who died from lung cancer was 0.00140 per year for cigarette smokers and 0.00010 per year for nonsmokers. The proportion who died from heart disease was 0.00669 for smokers and 0.00413 for nonsmokers.
1) Describe the association of smoking with lung cancer and with heart disease, using the difference of proportions, the relative risk, and the odds ratio. Interpret.
Lung Ca CHD
Risk diff
RR
OR
2) Which response (lung cancer or heart disease) is more strongly related to cigarette smoking, in terms of the reduction in the number of deaths that could occur with an absence of smoking?