Small Data Set

         Obs    stage    time    age    year    status

           1      1       1.3     53     -3        1
           2      1       2.4     45     -3        1 
           3      1       2.5     57      4        0 
           4      1       3.2     58      0        1 
           5      1       3.2     51      3        0 
           6      1       3.5     43     -3        1 
           7      1       4.0     52     -3        1 
           8      1       4.5     48      2        0 
           9      1       5.9     58      1        0 
          10      1       5.9     47      1        0 
          11      1       8.1     56     -1        0 
          12      1       9.6     58     -3        0 
          13      2       3.3     51      3        0 
          14      2       4.3     47      2        0 
          15      2       7.5     50     -1        0 
          16      2       7.6     53     -1        0 
          17      3       0.3     49     -2        1 
          18      3       0.5     57      0        1 
          19      3       1.0     49      2        1 
          20      3       1.9     53      0        1 
          21      3       3.2     54      1        1 
          22      3       3.7     52      3        0 
          23      3       4.8     54      2        0 
          24      3       5.0     59     -1        1 
          25      3       5.0     49      2        0 
          26      3      10.1     51     -3        0 
          27      4       1.0     41      3        1 
          28      4       4.3     48      2        0 
        Small Data Set Example showing Infinite Estimate

...
                       Convergence Status

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

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            Analysis of Maximum Likelihood Estimates

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

age       1   -0.06110    0.06783 0.8113    0.3677    0.941
year      1   -0.23378    0.14504 2.5981    0.1070    0.792
stg2      1  -16.00109       2354 0.0000    0.9946    0.000
stg3      1    0.91336    0.65327 1.9548    0.1621    2.493
stg4      1    0.97181    1.28438 0.5725    0.4493    2.643

         Regression Models Selected by Score Criterion

Number of       Score
Variables  Chi-Square  Variables Included in Model

        1     19.5608  stg4                                 
        1      2.5829  age                                  
        1      1.1358  stg2                                 
        1      0.8439  stg3                                 
        1      0.0928  year                                 
        2     22.4391  stg3 stg4                            
        2     21.3370  stg4 age                             
        2     19.7765  stg2 stg4                            
        2     19.6931  stg4 year                            
        2      3.4769  stg3 age                             
        2      3.3595  stg2 age                             
        2      2.7903  age year                             
        2      1.5163  stg2 stg3                            
        2      1.3313  stg2 year                            
        2      0.9548  stg3 year                            
        3     24.2430  stg3 stg4 age                        
        3     22.5651  stg3 stg4 year                       
        3     22.4550  stg2 stg3 stg4                       
        3     21.4382  stg2 stg4 age                        
        3     21.3886  stg4 age year                        
        3     19.8652  stg2 stg4 year                       
        3      3.8535  stg2 stg3 age                        
        3      3.7133  stg3 age year                        
        3      3.6747  stg2 age year                        
        3      1.7068  stg2 stg3 year                       
        4     24.3274  stg2 stg3 stg4 age                   
        4     24.2902  stg3 stg4 age year                   
        4     22.5991  stg2 stg3 stg4 year                  
        4     21.4723  stg2 stg4 age year                   
        4      4.1649  stg2 stg3 age year                   
        5     24.3965  stg2 stg3 stg4 age year