logistic regression question

Posted by Jordan Kennedy on Dec 04, 2011; 6:11pm
URL: http://spssx-discussion.165.s1.nabble.com/logistic-regression-question-tp5047539.html

Hello all:

I have run a simple bivariate logistic regression SPSS 19 for Windows.
The predictor is significantly associated with the outcome--with a
fairly large Odds Ratio. However, the classification table listed does
not classify particularly well. I have pasted the output below. Any
help would be greatly appreciated.

                                        Classification Table(a)
                                Predicted
                        o_adhdalc
        Observed                .00     1.00    Percentage Correct
Step 1  o_adhdalc       .00     209     0       100.0
                1.00    74      0       .0
Overall Percentage                              73.9


                                Variables in the Equation

                B       S.E.    Wald    df      Sig.    Exp(B)
Step 1a p2_alcadhd_l    1.471   .298    24.377  1       .000
        Constant        -3.335  .512    42.450  1       .000    .036


Thank you!

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