User Guide

105
Cox Regression Analysis
COXREG Command Additional Features
The SPSS command language also allows you to:
 Obtain frequency tables that consider cases lost to follow-up as a separate category
from censored cases.
 Select a reference category, other than first or last, for the deviation, simple, and
indicator contrast methods.
 Specify unequal spacing of categories for the polynomial contrast method.
 Specify additional iteration criteria.
 Control the treatment of missing values.
 Specify the names for saved variables.
 Write output to an external SPSS system file.
 Hold data for each split-file group in an external scratch file during processing.
This can help conserve memory resources when running analyses with large data
sets. This is not available with time-dependent covariates.
See the SPSS Syntax Reference Guide for complete syntax information.