Hi everyone,
I feel pretty stupid asking this question, but I can't seem to figure this out. I ran a Poisson regression model with quite a few control variables and SAS didn't seem to have an issue running it.
I'm writing up the analysis and I went to report the means and I noticed that the means from proc means don't make sense based on what the regression coefficients specified. For example the treatment coefficient was positive in the output, but when I calculated the means I noticed that the treatment was actually lower.
I first thought it was pretty odd, but then thought it must have been do to the control variables. That being said is there anyway to get the means and standard deviations while controlling for the variance introduced by the possible confounding variables.
Any help would be greatly appreciated. Thanks in advance!
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