As an example, my outcome is the proportion of patients with cerebral hemorrhages, and one subgroup would be patients <15 years old. I'd like to compare the proportion of those <15yo with cerebral hemorrhage to the proportion of ALL patients with cerebral hemorrhage. I can't find a way to do this in STATA13 using prtest, 2-way by groups or 2 way by variables as they all split the total population.

Any help would be much appreciated!