Hello, I was wondering if you have recieved any feedback from others regarding this question - I am in a very similar situation. My main question also related to weather using the robust variance estimators in a surveyproc is reasonable or required as surveyphreg already uses taylor series, balanced repeated replication, or delete-1 jack-knife methods. Barros suggests using the robust sandwhich estimators in his paper to more accurately esitmate the CI for the prevlanence ratio - which it seems you can request directly in the regular PHREG proc as the COVS option on the PROC PHREG statement. I do not think you can even request this in SURVEYPHREG, nor would it be appropriate. If you have any follow-up insight to share since posting this question, I would love to hear it. Thanks!
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