The All Patient Refined Diagnosis Related Group - Text Mining Techniques for Healthcare Provider Quality Determination - page 224

Figure 23. Tree branch for patients for more than 8.5 days stay
dx=dx2;
run;
data nis.dx3;
set nis.chf;
dx=dx3;
run;
data nis.dx4;
set nis.chf;
dx=dx4;
run;
data nis.dx5;
set nis.chf;
dx=dx5;
run;
data nis.dx6;
set nis.chf;
dx=dx6;
run;
data nis.dx7;
set nis.chf;