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Homework Help: Logistic Regression

  1. Nov 3, 2014 #1
    I am doing an independent research project and I have written a logistic regression program in SAS. The percent concordance is 97%, but hardly any variables are significant. Can anyone help me understand why this would happen?
  2. jcsd
  3. Nov 3, 2014 #2


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    Homework Helper

    There are many possible reasons for this. Would you be able to describe the situation in more detail?
    If all of the significance is in only a few variables, then you will not have many significant variables.
    Otherwise, you may have some dependence issues, and the program can't determine which variables are better than others.
    I would try reducing the model, and then applying some stepwise regression techniques to find the most significant factors.
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