Rosner 13.6

Rosner examined the relationship between lung cancer and drinking while controlling for smoking status. The discussion in Rosner starts in section 13.5 on page 607 over to page 608.

Compute the Mantel-Haenszel common odds ratio with stratification by baseline drinking status. Use the Mantel-Haenszel Chi Square test statistic to determine if we can conclude that there is an association between the risk factor of heavy drinking and lung cancer after controlling for smoking. Let alpha = .05.

Ho : There is no association between heavy drinking and lung cancer in individuals after controlling for a baseline status of individuals being smokers.

H A : There is an association between heavy drinking and lung cancer in individuals after controlling for a baseline status of individuals being smokers.

Step One: Create the Variables

1. Click the Variable View tab
2. Enter the variables Lungca , Drinking , and Smoking , and Frequency and create value labels for the first three. Create labels [1 = Lungcancer, 2 = No Lung Cancer], [1 = Heavydrinker, 2 = Nondrinker], and [1 = Smoker, 2 = Nonsmoker].

Here is a hint for entering the data:

Step two: Enter the Data

1. Click the Data View tab.
2. Select Data>Weight Cases to pull open the Weight Cases box. Select Weight Cases by the variable Frequency and move it to the Frequency variable box.
3. Click OK .
4. In the Analyze>Descriptives>Crosstabs dialog box, select the risk factor Drinking and move it to the Rows box. Select the risk factor Lungca and move it to the Columns box. Layer by Smoking .
5. Click Continue .
6. Click Statistics , select Chi square , Risk , Cochrane’s and Mantel-Haenszel .
7. Click Cells . Under Counts select Expected and under Percentages , select Row .
8. Click Continue .
9. Click OK .

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