| Literature DB >> 28966721 |
Abstract
For designing single-arm phase II trials with time-to-event endpoints, a sample size formula is derived for the modified one-sample log-rank test under the proportional hazards model. The derived formula enables new methods for designing trials that allow a flexible choice of the underlying survival distribution. Simulation results showed that the proposed formula provides an accurate estimation of sample size. The sample size calculation has been implemented in an R function for the purpose of trial design.Entities:
Keywords: contiguous alternative; one-sample log-rank test; proportional hazards model; sample size; single-arm phase II trial; time-to-event
Year: 2017 PMID: 28966721 PMCID: PMC5619878 DOI: 10.1080/19466315.2016.1174147
Source DB: PubMed Journal: Stat Biopharm Res ISSN: 1946-6315 Impact factor: 1.452