Group Sequential Designs Made Easy

A Web Interface Handbook

Learn how to use a web interface to design, explore, and optimize group sequential clinical trials leveraging the flexible capabilities of the R package gsDesign.


Keaven M. Anderson

Nan Xiao


Welcome to the online version of “Group Sequential Designs Made Easy: A Web Interface Handbook” by Keaven M. Anderson and Nan Xiao.

The web interface is built on the R package gsDesign. It supports a range of standard design types with flexible customization options enabled by gsDesign, and allows exploring the parameter space to validate and optimize the design in a convenient and reproducible way with output that can be directly incorporated in documents.