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Tips:Calculating Exact Age with the YRDIF Function
As of SAS version 9.3, you can calculate an exact age using the YRDIF function. In prior versions, one had to resort to another method, Calculating Age with Only One Line of Code. This is no longer necessary since the option AGE is now available for <basis>, YRDIF(start-date,end-date,<basis>). AGE is the default if no <basis> is specified, YRDIF(start-date,end-date).