Parameters | Clinical | Stratification Variables

Stratification Variables
Select one or more variables from the ADSL table by which to stratify the Cochran-Mantel-Haenszel exact test. Using such variables to stratify the analyses can help avoid confounding in the tests of interest.
Refer to PROC FREQ documentation for additional details.
To Specify Stratification Variables:
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All of the ADSL variables in the specified study are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the Stratification Variables field, as shown below: