title: Approximately optimal one-parameter boundaries for group sequential trials.
abstract: We present a class of group sequential tests, indexed by a single parameter, that yields approximately optimal results. We also provide tables of key values to help in the design of group sequential tests that meet selected specifications.
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D013223:Statistics as Topic / Q000379:methods*