Quality and Reliability Methods - SAS

378 Reliability and Survival Analysis II Chapter 20
Options and Reports
Figure 20.6 Fit Model Dialog for Parametric Survival Analysis
The survival analysis report shows the Whole Model Test and Parameter Estimates. The Whole Model test
compares the complete fit with what would have been fit if no regressor variables were in the model and
only an intercept term were fit.
When you have only an intercept term, the fit is the same as that from the univariate survival platform.
Options and Reports
The following parametric survival options (see Figure 20.7) are available from the red-triangle menu of the
report:
Likelihood Ratio Tests produces tests that compare the log likelihood from the fitted model to one that
removes each term from the model individually. The likelihood-ratio test is appended to the text reports.
Confidence Intervals calculates a profile-likelihood 95% confidence interval on each parameter and lists
them in the Parameter Estimates table.
Correlation of Estimates produces a correlation matrix for the model effects with each other and with
the parameter of the fitting distribution.
Covariance of Estimates produces a covariance matrix for the model effects with each other and with
the parameter of the fitting distribution.