SAS Overview: SEQDESIGN Procedure. The purpose of the SEQDESIGN procedure is to design interim analyses for clinical trials. Clinical trials are experiments on human subjects to demonstrate the efficacy and safety of new drugs or treatments. A simple example is a trial to test the effectiveness of a new drug in humans by comparing the outcomes in a group of patients who receive the new drug with the outcomes in a comparable group of patients who receive a placebo. ..

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  1. Zhu, Li; Ni, Liyun; Yao, Bin: Group sequential methods and software applications (2011)