The PHREG Procedure |
ID Statement |
The ID statement specifies additional variables for identifying observations in the input data. These variables are placed in the OUT= data set created by the OUTPUT statement. In the computation of the robust sandwich variance estimate, you can aggregate over distinct values of these ID variables.
Only variables in the input data set can be included in the ID statement.
Copyright © 2009 by SAS Institute Inc., Cary, NC, USA. All rights reserved.