Hi all, I'm working with a dataset where the records are births in a year - one birth per child born. I need to get counts of mothers - obviously one mother could have, say, up to 4 births records (in the case of quads). [Lets not worry about mothers who gave birth twice in one year - 9-12 months apart.] I can countthe mothers by using PROC FREQ on the variable that gives plurality of birth (coded as '1' for singletons, '2' for twins, 3 for triplets etc). By this method the number of mothers=(frequency count of singletons)+(frequency count of twins/2)+(frequency count of triplets/3)+etc. Ive been doing this on my calculator from the PROC FREQ output. But I'd love to be able to do this in SAS itself. Any ideas? Cheers L_B _________________________________________________________________ New, Used, Demo, Dealer or Private? Find it at CarPoint.com.au http://clk.atdmt.com/NMN/go/206222968/direct/01/