TESTASSUMPTIONS Subcommand (CSCOXREG command)

The TESTASSUMPTIONS subcommand produces tests of the proportional hazards and covariate form model assumptions. You can request various statistics associated with the alternative models.

PROPHAZARD Keyword

The PROPHAZARD keyword produces a test for proportional hazards assumption. The time function used in testing for proportional hazards is specified in parentheses. Specify one of the following options.

KM. Kaplan-Meier estimation of survival function. This is the default.

IDENTITY. Identity function of time.

LOG. Log function of time.

RANK. Rank of death time.

PARAMETER Keyword

The PARAMETER keyword displays the parameter estimates of the alternative model. The alternative model is estimated using the same convergence criteria as the original model. Both parameters and their standard errors are estimated.

COVB Keyword

The COVB keyword displays the covariance matrix for the alternative model parameters