Example 4 for PROC LIFEREG
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: LIFEREX4 */
/* TITLE: Example 4 for PROC LIFEREG */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: survival data analysis, arbitrary censoring */
/* PROCS: LIFEREG */
/* DATA: */
/* */
/* SUPPORT: lichen */
/* REF: PROC LIFEREG, EXAMPLE 4. */
/* MISC: */
/****************************************************************/
title 'Natural Recovery Time';
data mice;
input sex age time1 time2;
datalines;
1 57 631 631
1 45 . 170
1 54 227 227
1 43 143 143
1 64 916 .
1 67 691 705
1 44 100 100
1 59 730 .
1 47 365 365
1 74 1916 1916
2 79 1326 .
2 75 837 837
2 84 1200 1235
2 54 . 365
2 74 1255 1255
2 71 1823 .
2 65 537 637
2 33 583 683
2 77 955 .
2 46 577 577
;
data xrow1;
input sex age time1 time2;
datalines;
1 50 . .
;
data xrow2;
input sex age time1 time2;
datalines;
2 60.6 . .
;
ods graphics on;
proc lifereg data=mice xdata=xrow1;
class sex;
model (time1, time2) = age sex age*sex / dist=Weibull;
probplot / nodata
plower=.5
vref(intersect) = 75
vreflab = '75 Percent';
inset;
run;
proc lifereg data=mice xdata=xrow2;
class sex;
model (time1, time2) = age sex age*sex / dist=Weibull;
probplot / nodata
plower=.5
vref(intersect) = 75
vreflab = '75 Percent';
inset;
run;
title;
