Hi, Say you have an incidence rate in PYs. Suppose the variable is called MENNO = number of cases of meningitis And you have another variable called PYTOTAL = total person years of study 1. How do you program, in SAS, the incidence rate in person-years? (IR in PYs) 2. How do you program a 95% CI of the IR in PYs? 3. How do you program the IR in PYs after confounding, say for age, sex, race? I don't have any data yet. But I NEED to know the programming steps for these 3 questions and can't find them on the internet. I suck at macros at this point, too. Please help! Kate
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