TPHREG Procedure


The experimental TPHREG procedure adds the CLASS statement to the PHREG procedure. The CLASS statement enables you to specify categorical variables (also known as CLASS variables) as explanatory variables . Explanatory effects for the model, including covariates, main effects, interactions, and nested effects, can be specified in the same way as in the GLM procedure. The CLASS statement supports less-than -full-rank parameterization as well as various full-rank parameterizations such as reference coding and effect coding. Other CLASS statement features that are found in PROC LOGISTIC, such as specifying specific categories as reference levels, are also available.

The TPHREG procedure also enables you to specify CONTRAST statements for testing customized hypotheses concerning the regression parameters. Each CONTRAST statement also provides estimation of individual rows of contrasts, which is particularly useful in comparing the hazards between the categories of a CLASS explanatory variable.




SAS.STAT 9.1 Users Guide (Vol. 1)
SAS/STAT 9.1 Users Guide, Volumes 1-7
ISBN: 1590472438
EAN: 2147483647
Year: 2004
Pages: 156

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