The SAS System                                    09:20 Monday, May 12, 2008   1

The PHREG Procedure

        Model Information

Data Set                 WORK.A
Dependent Variable       time
Censoring Variable       delta
Censoring Value(s)       0
Ties Handling            BRESLOW


Number of Observations Read         150
Number of Observations Used         150


Summary of the Number of Event and Censored Values

                                     Percent
   Total       Event    Censored    Censored

     150          40         110       73.33


                       Convergence Status

         Convergence criterion (GCONV=1E-8) satisfied.


         Model Fit Statistics

                 Without           With
Criterion     Covariates     Covariates

-2 LOG L         371.631        363.775
AIC              371.631        365.775
SBC              371.631        367.464


          Testing Global Null Hypothesis: BETA=0

Test                    Chi-Square       DF     Pr > ChiSq

Likelihood Ratio            7.8559        1         0.0051
Score (Model-Based)         8.5388        1         0.0035
Score (Sandwich)            7.6473        1         0.0057
Wald (Model-Based)          7.9949        1         0.0047
Wald (Sandwich)             8.9318        1         0.0028


The SAS System                                    09:20 Monday, May 12, 2008   2

The PHREG Procedure

                   Analysis of Maximum Likelihood Estimates

                Parameter    Standard  StdErr                            Hazard
Parameter  DF    Estimate       Error   Ratio  Chi-Square  Pr > ChiSq     Ratio

trt         1     0.89747     0.30030   0.946      8.9318      0.0028     2.453