PROC SORT DATA=icu1;
  BY sex;
PROC PRINT DATA=icu1;
  BY sex;
  ID icuid;
  VAR age race;
  TITLE2  "Table 2a1. Grouping Lists";
RUN;


PROC SORT DATA=icu1;
  BY sex;
PROC PRINT DATA=icu1;
  BY sex;
  ID sex ;
  VAR icuid age race;
  TITLE2  "Table 2a2. Grouping Lists";

RUN;