Stratification for the purpose of interaction

[microdire27]

Hello all,

Is it possible not to have a reference group during stratification in SAS?

As shown in the table attached to this question, my professor asked for stratification of the ADHD severity level. I am not sure of how to achieve this with SAS since there must be a comparison group (ref group) and I have only two levels. Please help

[ChrisNZ]

Moved to stats community where you are more likely to get a reply.

[SteveDenham]

@microdire27  - This appears to be a duplication of your question here (https://communities.sas.com/t5/Statistical-Procedures/Stratification-Using-SAS/m-p/670750#M32042 ).  See my response at that link.

SteveDenham