I used that program for some other codes from PR1-PR15, but it still shows me one missing case, and the one you posted in your first response, is not showing me any missing case, I guess there is something in this program..that i copied below..that is showing one missing case. option missing= ' '; data library.nismicathcabg4; set library.nismicathcabg4; array dxtrialpci{15} pr1-pr15; pcitrial=0; do i=1 to 15; if dxtrialpci{i} in ('0066', '3604', '3606', '3607') then do; pcitrial=1; return; end; end; if n (pr1, pr1, pr3, pr4, pr5, pr6, pr7, pr8, pr9, pr10, pr11, pr12, pr13, pr14, pr15)=0 then pcitrial=. ; run;
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