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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.

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