Programming the statistical procedures from SAS

subgroup comparison

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subgroup comparison

For the categorical variable, like:

A.... B
1 2 1 2

The stratified them as above, I wanna test whether difference between 1 and 2 in group A is different to the difference between 1 and 2 in group B.

I know how to test it by hand.. just wondering is there any procedure or statement in SAS can achieve this goal??

If not, I will write a program by myself instead.

Thanks

Message was edited by: Fred_Gavin Message was edited by: Fred_Gavin
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