In a study of the association between cigarette smoking and lung cancer, 1,357 male lung cancer patients were compared with 1,357 controls in terms of their cigarette consumption as follows:

 Compute the odds ratio and log odds ratio in each of the 5 smoking groups compared with non-smokers. Find confidence intervals and graphically display. Comment and interpret. Can relative risks be estimated. Why or why not.

Cigarette Consumption Daily 0 1- 5- 15- 25- 50+ Total 49 516 445 299 Lung cancer patients 7 41 1,357 Controls 61 91 615 408 162 20 1,357