How to use retain function to retain the end date where AEOUT is fatal for a particular subject

[Manogna1231]

Condition 1: If AEOUT = Fatal, then output all AE's where
AESTDAT is on or after that Fatal AEENDAT

[andreas_lds · Accepted solution]

Could be solved by using proc sql with having-clause or by setting and retaining a flag if the condition is met and using output-statement conditionally, but that would require that the no obs has to be written to the result, that is before the condition is met.

If you need further help, please post the data you have in usable form (data step with datalines) and show the expected output.