/*----------------------------------------------------------------- S A S S A M P L E L I B R A R Y NAME: PHREX1 TITLE: Documentation Example 1 for PROC PHREG PRODUCT: STAT SYSTEM: ALL KEYS: Variable Selection, Stepwise Regression PROCS: PHREG DATA: Krall et al (1975), "A Step-up Procedure for Selecting Variables Associated with Survival," Biometrics, 31, pp 49-51 SUPPORT: sasycs REF: 9.2 SAS/STAT User's Guide, PROC PHREG Chapter MISC: -----------------------------------------------------------------*/ data Myeloma; input Time VStatus LogBUN HGB Platelet Age LogWBC Frac LogPBM Protein SCalc; label Time='Survival Time' VStatus='0=Alive 1=Dead'; datalines; 1.25 1 2.2175 9.4 1 67 3.6628 1 1.9542 12 10 1.25 1 1.9395 12.0 1 38 3.9868 1 1.9542 20 18 2.00 1 1.5185 9.8 1 81 3.8751 1 2.0000 2 15 2.00 1 1.7482 11.3 0 75 3.8062 1 1.2553 0 12 2.00 1 1.3010 5.1 0 57 3.7243 1 2.0000 3 9 3.00 1 1.5441 6.7 1 46 4.4757 0 1.9345 12 10 5.00 1 2.2355 10.1 1 50 4.9542 1 1.6628 4 9 5.00 1 1.6812 6.5 1 74 3.7324 0 1.7324 5 9 6.00 1 1.3617 9.0 1 77 3.5441 0 1.4624 1 8 6.00 1 2.1139 10.2 0 70 3.5441 1 1.3617 1 8 6.00 1 1.1139 9.7 1 60 3.5185 1 1.3979 0 10 6.00 1 1.4150 10.4 1 67 3.9294 1 1.6902 0 8 7.00 1 1.9777 9.5 1 48 3.3617 1 1.5682 5 10 7.00 1 1.0414 5.1 0 61 3.7324 1 2.0000 1 10 7.00 1 1.1761 11.4 1 53 3.7243 1 1.5185 1 13 9.00 1 1.7243 8.2 1 55 3.7993 1 1.7404 0 12 11.00 1 1.1139 14.0 1 61 3.8808 1 1.2788 0 10 11.00 1 1.2304 12.0 1 43 3.7709 1 1.1761 1 9 11.00 1 1.3010 13.2 1 65 3.7993 1 1.8195 1 10 11.00 1 1.5682 7.5 1 70 3.8865 0 1.6721 0 12 11.00 1 1.0792 9.6 1 51 3.5051 1 1.9031 0 9 13.00 1 0.7782 5.5 0 60 3.5798 1 1.3979 2 10 14.00 1 1.3979 14.6 1 66 3.7243 1 1.2553 2 10 15.00 1 1.6021 10.6 1 70 3.6902 1 1.4314 0 11 16.00 1 1.3424 9.0 1 48 3.9345 1 2.0000 0 10 16.00 1 1.3222 8.8 1 62 3.6990 1 0.6990 17 10 17.00 1 1.2304 10.0 1 53 3.8808 1 1.4472 4 9 17.00 1 1.5911 11.2 1 68 3.4314 0 1.6128 1 10 18.00 1 1.4472 7.5 1 65 3.5682 0 0.9031 7 8 19.00 1 1.0792 14.4 1 51 3.9191 1 2.0000 6 15 19.00 1 1.2553 7.5 0 60 3.7924 1 1.9294 5 9 24.00 1 1.3010 14.6 1 56 4.0899 1 0.4771 0 9 25.00 1 1.0000 12.4 1 67 3.8195 1 1.6435 0 10 26.00 1 1.2304 11.2 1 49 3.6021 1 2.0000 27 11 32.00 1 1.3222 10.6 1 46 3.6990 1 1.6335 1 9 35.00 1 1.1139 7.0 0 48 3.6532 1 1.1761 4 10 37.00 1 1.6021 11.0 1 63 3.9542 0 1.2041 7 9 41.00 1 1.0000 10.2 1 69 3.4771 1 1.4771 6 10 41.00 1 1.1461 5.0 1 70 3.5185 1 1.3424 0 9 51.00 1 1.5682 7.7 0 74 3.4150 1 1.0414 4 13 52.00 1 1.0000 10.1 1 60 3.8573 1 1.6532 4 10 54.00 1 1.2553 9.0 1 49 3.7243 1 1.6990 2 10 58.00 1 1.2041 12.1 1 42 3.6990 1 1.5798 22 10 66.00 1 1.4472 6.6 1 59 3.7853 1 1.8195 0 9 67.00 1 1.3222 12.8 1 52 3.6435 1 1.0414 1 10 88.00 1 1.1761 10.6 1 47 3.5563 0 1.7559 21 9 89.00 1 1.3222 14.0 1 63 3.6532 1 1.6232 1 9 92.00 1 1.4314 11.0 1 58 4.0755 1 1.4150 4 11 4.00 0 1.9542 10.2 1 59 4.0453 0 0.7782 12 10 4.00 0 1.9243 10.0 1 49 3.9590 0 1.6232 0 13 7.00 0 1.1139 12.4 1 48 3.7993 1 1.8573 0 10 7.00 0 1.5315 10.2 1 81 3.5911 0 1.8808 0 11 8.00 0 1.0792 9.9 1 57 3.8325 1 1.6532 0 8 12.00 0 1.1461 11.6 1 46 3.6435 0 1.1461 0 7 11.00 0 1.6128 14.0 1 60 3.7324 1 1.8451 3 9 12.00 0 1.3979 8.8 1 66 3.8388 1 1.3617 0 9 13.00 0 1.6628 4.9 0 71 3.6435 0 1.7924 0 9 16.00 0 1.1461 13.0 1 55 3.8573 0 0.9031 0 9 19.00 0 1.3222 13.0 1 59 3.7709 1 2.0000 1 10 19.00 0 1.3222 10.8 1 69 3.8808 1 1.5185 0 10 28.00 0 1.2304 7.3 1 82 3.7482 1 1.6721 0 9 41.00 0 1.7559 12.8 1 72 3.7243 1 1.4472 1 9 53.00 0 1.1139 12.0 1 66 3.6128 1 2.0000 1 11 57.00 0 1.2553 12.5 1 66 3.9685 0 1.9542 0 11 77.00 0 1.0792 14.0 1 60 3.6812 0 0.9542 0 12 ; proc phreg data=Myeloma; model Time*VStatus(0)=LogBUN HGB Platelet Age LogWBC Frac LogPBM Protein SCalc / selection=stepwise slentry=0.25 slstay=0.15 details; run;