Semiparametric Poisson Analysis
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The PHREG Procedure

        Model Information

Data Set                 WORK.RATS
Dependent Variable       start    
Dependent Variable       stop     
Censoring Variable       status   
Censoring Value(s)       0        
Ties Handling            BRESLOW  

Number of Observations Read         254
Number of Observations Used         254

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

     254         212          42       16.54

                       Convergence Status

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

         Model Fit Statistics
 
                 Without           With
Criterion     Covariates     Covariates

-2 LOG L        1633.647       1601.960
AIC             1633.647       1603.960
SBC             1633.647       1607.317

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

Likelihood Ratio        31.6869        1         <.0001
Score                   30.5430        1         <.0001
Wald                    28.9017        1         <.0001

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

trt         1     -0.81638      0.15186      28.9017       <.0001      0.442