Hi everyone 🙂   I need your help to solve the following issue:   I need to classify the _ascvd_S variable into 4 categories (described below). But the following code does not work for some values and I can't figure why:   1 - Creation of the dataset: %let NUM=0; data _ASCVD_IMP_SDS_&NUM.; format SUBJID $8. VISIT $16.; input SUBJID $ VISIT $ vis Current_smoker $ _ascvd_S $; datalines; 0805-004 Baseline 1 Yes 0.073 0805-004 Week_4 2 Yes 0.068 0101-003 Baseline 1 Yes 0.076 0101-003 Week_14 3 Yes 0.071 0003-007 Baseline 1 No 0.023 0003-007 Week_4 3 No 0.018 0003-007 End_of_treatment 4 No 0.018 0003-007 Week_4 3 No 0.018 0207-006 Baseline 1 No 0.322 0207-006 Week_4 2 No 0.199 1503-003 Baseline 1 No 0.214 1503-003 Week_14 3 No 0.199 0003-003 Baseline 1 Yes 0.257 0003-003 Week_28 5 Yes 0.199 ; run; 2 - derivation of the ascvd_100 variable: %let NUM=%eval(&NUM.+1); data _ASCVD_IMP_SDS_&NUM.; set _ASCVD_IMP_SDS_%eval(&NUM.-1); attrib ascvd_S label="Source ASCVD score (SDS)"; ascvd_S=_ascvd_S*1; attrib ascvd_100 label="ASCVD score (pct) (SDS)"; ascvd_100=_ascvd_S*100; drop _ascvd_S; run;   3 - derivation of the classification variable (ascvd_100_cl): %let NUM=%eval(&NUM.+1); data _ASCVD_IMP_SDS_&NUM.; set _ASCVD_IMP_SDS_%eval(&NUM.-1); * ASCVD class; attrib ascvd_S_cl format=$40. label="10-year risk for ASCVD (SDS)"; if missing(ascvd_S) eq 0 then do; if ascvd_S<0.05 then ascvd_S_cl=" Low-risk (<0.05)"; else if 0.05<=ascvd_S<=0.074 then ascvd_S_cl=" Borderline risk (0.05 to 0.074)"; else if 0.074<=ascvd_S<=0.199 then ascvd_S_cl=" Intermediate risk (0.075 to 0.199)"; else if 0.2<=ascvd_S then ascvd_S_cl="High risk (>=0.2)"; end; attrib ascvd_100_cl format=$40. label="10-year risk for ASCVD (SDS)"; if missing(ascvd_100) eq 0 then do; if ascvd_100<5 then ascvd_100_cl=" Low-risk (<5pct)"; else if 5<=ascvd_100<=7.4 then ascvd_100_cl=" Borderline risk (5 to 7.4pct)"; else if 7.5<=ascvd_100<=19.9 then ascvd_100_cl=" Intermediate risk (7.5 to 19.9pct)"; else if 20<=ascvd_100 then ascvd_100_cl="High risk (>=20pct)"; end; run;   As you can see, after running those 3 steps, the ascvd_100_cl parameter is not filled for ascvd_100 values = 19.9 whereas parameter ascvd_S_cl (based on ascvd_S) is. Certainely I'm missing something here, but if anyone can help it would be very much appreciated! ... View more