Hello SAS Community, I am working on a Medicaid dataset that includes a treatment and a control group. To finalize who will be in my treatment group, I need to determine the patients who had continuous enrollment for at least 9 months into an intervention program. I already reconciled the dataset and removed all the duplicated months and years of their enrollment. My reconciling code worked fine, which was- data Babies_Clean(drop=prior_: temp_: orig_:); retain orsid begin end; format Prior_end Orig_begin Orig_end temp_beg temp_end begin end yymm10.; set Mcaid_elig_babies(rename=(begin=Orig_begin end =Orig_end )); by orsid Orig_begin Orig_end; if Orig_begin > Orig_end then delete; Prior_end = lag(Orig_end); if first.orsid then do; temp_beg = Orig_begin; temp_end = Orig_end; Prior_end = .; end; else if 0 <= (Orig_begin - Prior_end) <= 1 then do; temp_end = Orig_end; end; else if (Orig_begin - temp_end) > 1 then do; begin = temp_beg; end = temp_end; output; temp_beg = Orig_begin; temp_end = Orig_end; end; else if temp_beg <= Orig_begin <= temp_end then do; if Orig_end > temp_end then temp_end = Orig_end; end; if last.orsid then do; begin = temp_beg; if Orig_end > temp_end then end = Orig_end; else end = temp_end; output; end; run; Now I want to write the codes that will indicate the patients who were enrolled for at least 9 months into that program separately from those who were enrolled for less than 9 months. I also want to create a new binary variable that will show this indication [i.e., 1 = eligible (had at least 9 months enrollment), 0 = not eligible). Please help me with this coding. Thanks a lot! Farah ... View more