Download - United States Renal Data System

PROC LIFETEST DATA=inc_95_s METHOD=KM NOTABLE PLOTS=(s) OUTSURV=surv95;
TIME t*c(0);
TITLE ‘1995 Incident Dialysis Patients 5-Year Survival Rates’;
RUN;
Example 5: Merge with Medical Evidence file (CMS 2728)
Demonstrate a way to extract comorbid conditions for a pre-defined study cohort from the Medical Evidence file.
DATA medevid;
SET core_cd.medevid (KEEP=usrds_id cancer cararr carfail
cva diabins diabprim dysrhyt hyper ihd
mi pulmon pvasc);
BY usrds_id;
RUN;
IF (FIRST.usrds_id);
DATA me_2728;
MERGE medevid (IN=x1)
core_cd.patients (IN=x2 KEEP=usrds_id died tx1date);
BY usrds_id;
RUN;
IF x1 AND x2;
DATA inc98_me;
MERGE inc90_99 (IN=x1 WHERE=(inc_year = 1998))
me_2728 (IN=x2);
BY usrds_id;
RUN;
IF x1 AND x2;
Example 6 : 1998 Incident Patient Survival Rates (Kaplan Meier)
Show a survival rate calculation stratified by patient comorbid condition.
DATA inc_98_s;
SET inc98_me;
BY usrds_id;
IF (UPCASE(cancer) IN (‘1’ ‘2’ ‘Y’ ‘N’));
IF (UPCASE(cancer) IN (‘1’ ‘Y’)) THEN
can = 1;
ELSE
can = 0;
* Calculate the survival time (in month) of each incident patient.;
t = (MIN(died, MDY(12,31,1999)) - esrddate + 1) / 30.4375;
IF (t < 0) THEN t = 0;
RUN;
* Determine whether the patient is censored.;
c = (MIN(died, MDY(12,31,1999)) = died);
PROC LIFETEST DATA=inc_98_s METHOD=KM NOTABLE PLOTS=(s) OUTSURV=surv98;
TIME t*c(0);
STRATA can;
12 e Getting Started