The SAS System                                1

                              The PHREG Procedure

                               Model Information

                       Data Set                 WORK.WORK
                       Dependent Variable       survt    
                       Censoring Variable       censor   
                       Censoring Value(s)       0        
                       Ties Handling            BRESLOW  


                    Number of Observations Read          36
                    Number of Observations Used          36


               Summary of the Number of Event and Censored Values
 
                                                       Percent
                     Total       Event    Censored    Censored

                        36          32           4       11.11


                               Convergence Status

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


                             Model Fit Statistics
 
                                     Without           With
                    Criterion     Covariates     Covariates

                    -2 LOG L         177.667        162.479
                    AIC              177.667        172.479
                    SBC              177.667        179.808


                    Testing Global Null Hypothesis: BETA=0
 
            Test                 Chi-Square       DF     Pr > ChiSq

            Likelihood Ratio        15.1875        5         0.0096
            Score                   18.9813        5         0.0019
            Wald                    14.3679        5         0.0134


                   Analysis of Maximum Likelihood Estimates
 
                        Parameter      Standard
    Parameter    DF      Estimate         Error    Chi-Square    Pr > ChiSq

    neph          1      -1.94325       0.73052        7.0761        0.0078
    A2            1       0.00548       0.83489        0.0000        0.9948
    A3            1       0.06513       1.17737        0.0031        0.9559
    neph*A2       1      -0.05114       0.97067        0.0028        0.9580
    neph*A3       1       2.00299       1.34276        2.2251        0.1358

                                 The SAS System                                2

                              The PHREG Procedure

                    Analysis of Maximum Likelihood Estimates
 
                          Hazard      95% Hazard Ratio
           Parameter       Ratio      Confidence Limits     Label

           neph             .           .           .                
           A2               .           .           .                
           A3               .           .           .                
           neph*A2          .           .           .       neph * A2
           neph*A3          .           .           .       neph * A3


                          Estimated Covariance Matrix
 
 Parameter                             neph                A2                A3

 neph                           0.533663165       0.328640521       0.322484117
 A2                             0.328640521       0.697041768       0.358729591
 A3                             0.322484117       0.358729591       1.386197836
 nephA2         neph * A2      -0.409388396      -0.695467570      -0.356542239
 nephA3         neph * A3      -0.528984473      -0.341422897      -1.356884830

                          Estimated Covariance Matrix
 
          Parameter                           nephA2            nephA3

          neph                          -0.409388396      -0.528984473
          A2                            -0.695467570      -0.341422897
          A3                            -0.356542239      -1.356884830
          nephA2         neph * A2       0.942203244       0.421292956
          nephA3         neph * A3       0.421292956       1.803013374