- Poster presentation
- Open Access
Two-arm randomised futility trials: PD-stat - a futility trial of a potential neuroprotective treatment in people with Parkinson's disease
© Creanor et al. 2015
- Published: 16 November 2015
- Phase Study
- Concurrent Control
- Subsequent Finding
- Clinical Area
- Minimum Response
Futility trials are efficient, early phase studies designed to eliminate potential interventions or treatments before moving into large and expensive, definitive phase III trials. In a futility trial, the null and alternative hypotheses are reversed in comparison with the usual superiority trial and are one-sided. The null hypothesis is that the intervention reaches or exceeds the required level of benefit.
Initially used in oncology, where such studies are usually simply referred to as phase II trials and have relatively short follow-up periods, there has been increasing interest in the use of the futility trial design in other clinical areas, in particular in neurological diseases. Typically, such futility studies have had a single arm and have tested whether the new treatment exceeds a pre-defined futility threshold, set as the minimum response worthwhile to justify moving to a definitive trial. However, in neurological diseases, such as Parkinson's disease, the lack of a concurrent control group has led to criticism of the subsequent findings. In an attempt to overcome such issues, it is possible to use a randomised two-arm design, whilst still testing for futility.
PD-STAT, funded by the Cure Parkinson's Trust (CPT) and JP Moulton Charitable Foundation as part of the CPT's Linked Clinical Trials Initiative, is the first UK study to utilise this design in Parkinson's disease. We will describe the design characteristics and planned analysis of this trial and outline some of the advantages and challenges associated with futility trials.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.