Programming the statistical procedures from SAS

testing effect modification of the matching variable in matched case-control

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testing effect modification of the matching variable in matched case-control

Hi all,

I am doing a matched case-control study in SAS using eitherproc logistic or proc phreg. I want to test the effect modification of thematching variable, say gender. Does anyone know how it can be done in SAS?

Many thanks in advance!

Hong

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