title: A new program to compute and evaluate continuously monitored stopping boundaries for clinical trials.
abstract: We present code for the calculation and evaluation of continuously monitored stopping boundaries for use in one-arm and two-arm clinical trials. These designs were first developed for one-arm trials by Thall, Simon and Estey (TSE) (P.F. Thall, R. Simon, E.H. Estey, Bayesian sequential monitoring designs for single-arm clinical trials with multiple outcomes, Stat. Med. 14 (1995) 357-379). Our code corrects some problems in the original TSE algorithms and extends these algorithms for use in a two-arm trial setting. It is written in S-Plus to improve interactivity for the statistically adept user, and employs external routines, dynamically loaded into S-Plus, to improve calculation efficiency. Efficient versions of our code require both a C compiler and the S-Plus program. Our code has been tested in UNIX and Microsoft Windows environments, and compiled code is available from our website. A numerical integration routine for the convolution of beta distributions is included.
authors.affiliation: H. Lee Moffitt Cancer Center and Research Institute, University of South Florida, Tampa 33612-9497, USA. lazarien@moffitt.usf.edu
authors.forename: E
authors.initials: E
authors.lastname: Lazaridis
authors.forename: R
authors.initials: R
authors.lastname: Gonin
mesh_terms: D002986:Clinical Trials as Topic; D017322:Clinical Trials, Phase II as Topic; D006801:Humans; D008432:Mathematical Computing; D010043:Outcome and Process Assessment, Health Care; D016032:Randomized Controlled Trials as Topic; D012984:Software