In a SAS data step
if date2>date1 and not missing(date1);
In a SAS data step
if date2>date1 and not missing(date1);
@dr_101 wrote:
thank you very much for replying. will it set the distance between the two events at least one year? some ids have as little as 2 months gap between event 2 and event 1. I want to select only those with atleast 1 year gap.
thanks.
Your original post did not specify you wanted 1 year intervals.
A 1 year gap can be found via:
if date2>(date1+365) and not missing(date1);
Might need an adjustment if you really are concerned about leap years.
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