LOGISTIC Procedure

The LOGISTIC procedure performs Firth’s penalized maximum likelihood. The MULTIPASS option forces the procedure to reread the input data set as needed rather than requiring its storage in memory or in a temporary file on disk. Estimated culmulative probabilities have been added to the SCORE statement output. The CONTRAST statement now includes the inverse link. The ROCCONTRAST statement compares different ROC models. Odds ratios in the presence of interactions are now computed, and odds ratio plots are provided. Note that the GRAPHICS statement has been replaced with the PLOTS= option in the PROC statement. The EFFECT plot can now handle multiple CLASS and continuous variables. Standard errors are now produced for the exact parameter estimates.