Tessa,
I need to add sth!
/* generating a variable holding the date from the appointment with
def_inrange==1. This won't work for groups where def_inrange takes
a missing value.
Added: an if-condition to make sure that the command does not produce
wrong results for groups with all def_inranges==0!
*/
bysort donor_id (def_inrange): gen test=date[_N] if def_inrange[_N]==1
Sebastian
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