FILENAME goptions URL "http://192.38.117.59/~linearpredictors/datafiles/goptions.sas";
%include goptions;

    
FILENAME url URL "http://192.38.117.59/~linearpredictors/datafiles/readCsl.sas";
%include url;

DATA csl; SET csl;

  /* CREATES DUMMY VARIABLES FOR TREATMENT, ASCITES, SEX
     AND THEIR INTERACTIONS */

   prednisone=(tment=0);
   asc12=(asc=1 OR asc=2);
   predno=prednisone*(asc=0);   
   predasc=prednisone*asc12;
   predk=prednisone*(1-sex);
   predm=prednisone*sex;
   asc12k=asc12*(1-sex);
   asc12m=asc12*sex;
   prednoasck=prednisone*(1-asc12)*(1-sex);
   prednoascm=prednisone*(1-asc12)*sex;   
   predasck=prednisone*asc12*(1-sex);
   predascm=prednisone*asc12*sex;      
RUN;

PROC PHREG DATA=csl;
   MODEL days*dc(0)=sex asc12k asc12m prednoasck predasck 
                    prednoascm predascm/RISKLIMITS;
RUN;

PROC PHREG DATA=csl;
   MODEL days*dc(0)=sex asc12k asc12m prednisone/RISKLIMITS;
RUN;

PROC PHREG DATA=csl;
   MODEL days*dc(0)=sex asc12k asc12m predno predasc/RISKLIMITS; 
RUN;

PROC PHREG DATA=csl;
   MODEL days*dc(0)=sex asc12k asc12m predk predm/RISKLIMITS; 
RUN;

PROC PHREG DATA=csl;
   MODEL days*dc(0)=sex asc12 prednisone
                    predasc predm asc12m/RISKLIMITS;
RUN;

QUIT;