Rosner 13.11 and 13.12

In Example 13.23, Rosner examines the effect of passive smoking on cancer risk (see pages 612-620). Passive smoking is exposure to the smoking by a spouse who smokes at least a cigarette a day over the last six months. A possible confounding variable is smoking by the participants. This SPSS analysis controls for a participant’s smoking in the study while examining the relationship between passive smoking and cancer risk. Please note that I have rotated the 2 X 2 Tables 13.11 and 13.12 so that cancer cases and controls are in the columns needed for SPSS.

Compute the Mantel-Haenszel common odds ratio with stratification by the participants’ smoking 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 passive smoking and cancer risk. Let alpha = .05.

Ho : There is no association between the exposure of passive smoking and cancer risk in families with participants who themselves are smokers.

H A : There is an association between the exposure of passive smoking and cancer risk in families with participants who themselves are smokers.

Step One: Create the Variables

1. Click the Variable View tab
2. Enter the variables Cancer , Passivesmoke , and Selfsmoker , and Frequency and create value labels for the first three. Create value labels [1 = cancer case, 2 = control], [1 = passive smoke exposure, 2 = no passive smoke exposure], and [1 = smoker, 2 = nonsmoker].

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 variable Passivesmoke and move it to the Rows box. Select the variable Cancer and move it to the Columns box. Layer by Selfsmoker .
5. Click Continue .
6. Click Statistics , and 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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Solution: The downloadable solution consists of 6 pages, 587 words and 4 charts.
Deliverable: Word Document