The QUANTLIFE Procedure (Experimental)

specifies the confidence level for the regression parameters. The value must be between 0 and 1. The default is ALPHA=0.05, which corresponds to a 95% confidence interval.

specifies the method used to compute confidence intervals for regression parameters. In addition to confidence intervals, the QUANTLIFE procedure also computes standard errors, t values, and p-values for regression parameters. You can suppress these computations by specifying CI=NONE. The QUANTLIFE procedure provides two resampling methods for computing confidence intervals, the exponentially weighted (EW) method and the pairwise (PW) resampling method. See the section Confidence Interval methods for details. The default is CI=EW, which requests the exponentially weighted method.

specifies the input SAS data set that the QUANTLIFE procedure uses. By default, the most recently created SAS data set is used.

specifies the step size for computing regression quantiles. The value must be between 0 and 1. See the section Details: QUANTLIFE Procedure for details.

specifies the first quantile level for computing regression quantiles. The value must be between 0 and 1. See the section Details: QUANTLIFE Procedure for details.

specifies the step-length parameter for the interior point algorithm. The value must be between 0 and 1. The interior point method used by the QUANTLIFE is identical to the interior point method used by the QUANTREG procedure. See the section Interior Point Algorithm: Interior Point Algorithm, for details. The default is KAPPA=0.99995.

requests that a log transformation of the response variable be performed before the model is fitted.

specifies the maximum number of iterations for the interior point algorithm. The default is MAXIT= 1000.

specifies the method used to estimate the regression parameters. KM specifies the Kaplan-Meier-type method (see the section Kaplan-Meier-Type Estimator for Censored Quantile Regression) and NA specifies the Nelson-Aalen-type method (see the section Nelson-Aalen-Type Estimator for Censored Quantile Regression). The default is METHOD=KM.

specifies the length of effect names in tables and output data sets to be n characters, where n is a value between 20 and 200. The default is NAMELEN=20.

specifies the number of replications to draw in the resampling method. The default is NREP=200.

creates a data set to contain the parameter estimates from the resampled data sets.

See the section OUTBOOTEST= Output Data Set for a detailed description of the contents of the OUTBOOTEST= data set.

requests various plots.

When you specify one plot-request, you can omit the parentheses around the plot request.

ODS Graphics must be enabled before plots can be requested. For example:

ods graphics on;
 
proc quantlife plots=survival;
   model y=x1;
run;
 
ods graphics off;

For more information about enabling and disabling ODS Graphics, see the section Enabling and Disabling ODS Graphics in Chapter 21: Statistical Graphics Using ODS.

You can specify one or more of the following plot-requests:

specifies a positive integer to start the pseudorandom number generator. The default is a value that is generated from reading the time of day from the computer’s clock. However, to duplicate the results under identical situations, you must specify the same seed in subsequent runs of the QUANTLIFE procedure. The seed information is displayed in the “Model Information” table.

specifies the tolerance for the convergence criterion of the interior point algorithm. Both the QUANTLIFE procedure and the QUANTREG procedure use the duality gap as the convergence criterion. See Interior Point Algorithm: Interior Point Algorithm, for details. The default is TOLERANCE=1E–8.