I am looking to compare my output for a treatment effect in a regression model to an estimate of crude event rate obtained without using a regression model. The regression model is not causing any difficulties, but my other model is. I want to compute my total number of events and the follow-up time for each of my treatment groups so that I can provide a crude event rate for each of my treatment groups, but thus far I have not been able to achieve this. I assumed I could use a proc freq procedure:
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