Dear collegs, need help A problem w. PHREG. are there any advice what does it mean The last variable always gives no results. DF=0 and no other values. The code is like PROC PHREG data=AAA; MODEL PHDAYS*DIH(1)=AGE SEX PCRE1 PCRE2 PCRE3 PCRE4 PCRE5 PCRE6/RL; run; very simple data like The SAS System 18:04 Friday, September 18, 2009 105 Cumulative Cumulative PCRE1 Frequency Percent Frequency Percent --------------------------------------------------- 0 800 83.3 800 83.3 1 160 16.7 960 100.0 Cumulative Cumulative PCRE2 Frequency Percent Frequency Percent --------------------------------------------------- 0 803 83.6 803 83.6 1 157 16.4 960 100.0 Cumulative Cumulative PCRE3 Frequency Percent Frequency Percent --------------------------------------------------- 0 807 84.1 807 84.1 1 153 15.9 960 100.0 Cumulative Cumulative PCRE4 Frequency Percent Frequency Percent --------------------------------------------------- 0 804 83.8 804 83.8 1 156 16.3 960 100.0 Cumulative Cumulative PCRE5 Frequency Percent Frequency Percent --------------------------------------------------- 0 802 83.5 802 83.5 1 158 16.5 960 100.0 Cumulative Cumulative PCRE6 Frequency Percent Frequency Percent --------------------------------------------------- 0 784 81.7 784 81.7 1 176 18.3 960 100.0 THE RESULT IS The PHREG Procedure Data Set: WORK.AAA Dependent Variable: PHDAYS RANK FOR VARIABLE HDAYS Censoring Variable: DIH Censoring Value(s): 1 Ties Handling: BRESLOW Summary of the Number of Event and Censored Values Percent Total Event Censored Censored 959 207 752 78.42 Testing Global Null Hypothesis: BETA=0 Without With Criterion Covariates Covariates Model Chi-Square -2 LOG L 2745.091 2694.626 50.465 with 7 DF (p=0.0001) Score . . 52.443 with 7 DF (p=0.0001) Wald . . 48.693 with 7 DF (p=0.0001) Analysis of Maximum Likelihood Estimates Conditional Risk Ratio and 95% Confidence Limits Parameter Standard Wald Pr > Risk Variable DF Estimate Error Chi-Square Chi-Square Ratio Lower Upper Label AGE 1 0.011676 0.00798 2.14021 0.1435 1.012 0.996 1.028 AGE SEX 1 0.175988 0.15395 1.30686 0.2530 1.192 0.882 1.612 SEX PCRE1 1 -0.830596 0.23520 12.47090 0.0004 0.436 0.275 0.691 PCRE2 1 -1.311773 0.28412 21.31581 0.0001 0.269 0.154 0.470 PCRE3 1 -0.870943 0.24467 12.67077 0.0004 0.419 0.259 0.676 PCRE4 1 -0.774639 0.23232 11.11825 0.0009 0.461 0.292 0.727 PCRE5 1 -0.039880 0.19120 0.04351 0.8348 0.961 0.661 1.398 PCRE6 0 0 . . . . . .
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