DATA icu1;
  SET icu;
  LABEL icuid ="ID ICUID"
          sta ="Vital Status STA"
          ser ="Service at ICU Admission SER"
          can ="Cancer Present? CAN"
          crn ="Chronic/Renal/Failure?/CRN"
          inf ="Infection/Probable?/INF"
          cpr ="CPR/Prior/to Admit?/CPR"
          sys ="Systolic/Blood/Pressure/SYS"
          hra ="Heart/Rate/HRA"
          pre ="Previous/Admission/in 6mths?/PRE"
          typ ="Type/of/Admission/TYP"
          fra ="Fracture?/FRA"
          po2 ="PO2 from/Blood/Gas/PO2"
           ph ="PH from Blood Gas PH"
          pco ="PCO2 from/Blood/Gas/PCO"
          bic ="Bicarbonate/From/Blood/Gas/BIC"
          cre ="Creatinine/CRE"
          loc ="Level/of/Consciousness/LOC";

PROC CONTENTS DATA=icu1;
  TITLE2 "Table 1a1.  Effect of adding Labels in Contents";

PROC PRINT DATA=icu1  LABEL;
  ID icuid;
  VAR  age sta ser can ph ;
  TITLE2 "Table 1a2.  Adding Simple Variable Labels";
RUN;