The SAS System                          1
                                  13:27 Wednesday, December 13, 2017

  Obs  case  vh  sl  fatal      vt             beltuse

    1    1    1  50  Fatal      Van  Improper or no restraint use
    2    2    1  45  Not fatal  Car  Improper or no restraint use
    3    2    2  45  Not fatal  Car  Improper or no restraint use
    4    3    1  50  Fatal      Car  Improper or no restraint use
    5    4    1  35  Not fatal  Car  Improper or no restraint use
           Stratified results with 1 entry strata left in          2
                                  13:27 Wednesday, December 13, 2017

                       The LOGISTIC Procedure
 
                        Conditional Analysis

                         Model Information

      Data Set                           WORK.PAIREDCRASH    
      Response Variable                  fatal               
      Number of Response Levels          2                   
      Number of Strata                   664                 
      Number of Uninformative Strata     472                 
      Frequency Uninformative            565                 
      Model                              binary logit        
      Optimization Technique             Newton-Raphson ridge

...
                           Strata Summary
                         fatal
                    --------------
        Response               Not    Number of
         Pattern    Fatal    fatal       Strata    Frequency
               1        0        1          210          210
               2        1        0          169          169
               3        0        2           85          170
               4        1        1          192          384
               5        2        0            8           16

              Testing Global Null Hypothesis: BETA=0
      Test                 Chi-Square       DF     Pr > ChiSq
      Likelihood Ratio        32.9050        1         <.0001
      Score                   30.8681        1         <.0001
      Wald                    26.6809        1         <.0001

...
       Analysis of Conditional Maximum Likelihood Estimates
                                        Standard
Parameter             DF    Estimate       Error

beltuse   Improper     1      0.6661      0.1290

         Stratified results with 1 entry strata removed 
                        Conditional Analysis
                                                      Design
       Class       Value                            Variables

       beltuse     Improper or no restraint use             1
                   Proper restraint use                    -1

                           Strata Summary
                         fatal
                    --------------
        Response               Not    Number of
         Pattern    Fatal    fatal       Strata    Frequency

               1        0        1            3            3
               2        1        0            1            1
               3        0        2           85          170
               4        1        1          192          384
               5        2        0            8           16
...
                                        Standard
Parameter             DF    Estimate       Error

beltuse   Improper     1      0.6661      0.1290
                       Stratified exact results
            Exact Conditional Tests
 
                                    --- p-Value ---
Effect    Test        Statistic    Exact      Mid

beltuse   Score         30.8681   <.0001   <.0001
          Probability  7.331E-9   <.0001   <.0001

                     Exact Parameter Estimates
 
                                     Standard
    Parameter            Estimate       Error
    beltuse   Improper     0.6661      0.1290

                  General regression exact results
 Class    Value          Design Variables
 case     2          1   0   0   0   0   0   0
          5          0   1   0   0   0   0   0
          6          0   0   1   0   0   0   0
          8          0   0   0   1   0   0   0
          9          0   0   0   0   1   0   0
          11         0   0   0   0   0   1   0
          12         0   0   0   0   0   0   1
          13         0   0   0   0   0   0   0
          15         0   0   0   0   0   0   0
...
                Model Convergence Status
   Quasi-complete separation of data points detected.       

            Type 3 Analysis of Effects
Effect       DF   Wald Chi-Square  Pr>ChiSq
beltuse       1       53.3619        <.0001
case        288       32.7084        1.0000
             Analysis of Maximum Likelihood Estimates
 
                                        Standard
Parameter             DF    Estimate       Error

Intercept              1     -3.7523     30.3266
beltuse   Improper     1      1.3322      0.1824
case      2            1    -11.8894       902.5
case      5            1      5.0845     30.3598
case      6            1     -9.2249       902.5
case      8            1      5.0845     30.3598
case      9            1      5.0845     30.3598
...
case      699          1      3.7523     30.3761
case      701          1      5.0845     30.3598

                        Odds Ratio Estimates
...

Association of Predicted Probabilities and Observed Responses

         Percent Concordant     78.5    Somers' D    0.720
         Percent Discordant      6.5    Gamma        0.848
         Percent Tied           15.0    Tau-a        0.334
         Pairs                 76285    c            0.860
                  General regression exact results     55
 
                     Exact Conditional Analysis

                      Exact Conditional Tests
 
                                            --- p-Value ---
        Effect    Test          Statistic    Exact      Mid

        beltuse   Score           30.8681   <.0001   <.0001
                  Probability    7.331E-9   <.0001   <.0001


                     Exact Parameter Estimates
 
                                     Standard
    Parameter            Estimate       Error

    beltuse   Improper     0.6661      0.1290