G18.15

Doll and Hill, 1950. An important historical case-control completed by Doll and Hill found that 647 of the 649 lung cancer cases were smokers. In contrast, 622 of 649 controls smoked. Display these data as a 2x2 table and calculate the odds ratio associated with smoking. Include a 95% confidence interval for the OR.

The odds ratio is ______

Interpretation: .

Stata Output:

The 95% CI for the OR is _________

CI Interpretation:

The following 2x2 table summarizes the data:

	Lung cancer cases	Controls
Smokers	647	622
Nonsmokers	2	27