User Guide

104
Chapter 11
Cox Regression Options
Figure 11-5
Cox Regression Options dialog box
You can control various aspects of your analysis and output.
Model Statistics. You can obtain statistics for your model parameters, including
confidence intervals for exp(B) and correlation of estimates. You can request these
statistics either at each step or at the last step only.
Probability for Stepwise. If you have selected a stepwise method, you can specify the
probability for either entry or removal from the model. A variable is entered if the
significance level of its F-to-enter is less than the Entry value, and a variable is
removed if the significance level is greater than the Removal value. The Entry value
must be less than the Removal value.
Maximum Iterations. Allows you to specify the maximum iterations for the model,
which controls how long the procedure will search for a solution.
Display baseline function. Allows you to display the baseline hazard function and
cumulative survival at the mean of the covariates. This display is not available if you
have specified time-dependent covariates.
Cox Regression Define Event for Status Variable
Enter the value or values indicating that the terminal event has occurred. You can enter
a single value, a range of values, or a list of values. The Range of Values option is
available only if your status variable is numeric.