The following statements are available in PROC SEQDESIGN:
The PROC SEQDESIGN statement and the DESIGN statement are required for the SEQDESIGN procedure. Each DESIGN statement requests a new group sequential design, and multiple DESIGN statements can be used to create more than one design for comparison of features. The label, which must be a valid SAS name, is used to identify the design in the output tables and graphics. The SAMPLESIZE statement computes the required sample sizes for the design specified in each DESIGN statement. With a selected design, the SAMPLESIZE statement computes the required sample sizes for the trial.