Thank you for your response @Rick_SAS ! I kind of know what the numeric result should be. Our previous statistician calculated for one set of data. I need to repeat calculation for another set. I found that online tool openepi ( https://www.openepi.com/PersonTime1/PersonTime1.htm) can produce rate and CI intervals exactly as in his original calculation. Please see screenshot below The number of cases I entered in that tool is total count of cases for all ages for 2001. Person-time is total population for all ages for 2001. Based on results above Poisson approx. and Fisher's exact test give me original result by just providing these two numbers above. I prefer to use Poison approx. as I found in statistician notes he used exact Poisson method. I would greatly appreciate your help in how to get this result in SAS just for one year. I can run then for all years Thank you!
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