In a prospective study, Data collected extensive information on incidence of coronary heart disease (CHD) among smoker and non-smoker individuals.
The table below summarizes the results
Risk factor
|
Cases of CHD
|
Non cases of CHD
|
Total
|
Smoker
|
84
|
2916
|
3000
|
Non smoker
|
87
|
4913
|
5000
|
(a) What is the absolute risk of CHD among smokers?
(b) What is the relative risk of CHD when men smoke extensively compared to men who do not smoke?
(c) Interpret this relative risk.