I have 2 cohorts with counts of an event for each. But I've calculated 3 different relative percentages - % of the overall cohort, % of all those patients who have evidence of the event and % of patients in a similar age group. So the denominator in the % changes for each.
I've done a chi-squared test but I don't think that's entirely what I want. Basically I want to test the 2-sample proportion values for each type of proportion to test whether p(cohort1)=p(cohort2) and I'm just not thinking clearly.