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Statistical analysis plan for the ‘Triple Antiplatelets for Reducing Dependency after Ischaemic Stroke’ (TARDIS) trial

Bath, Philip M.W.; Robson, Katie; Woodhouse, Lisa J.; Sprigg, Nikola; Dineen, Robert A.; Pocock, Stuart J.

Authors

PHILIP BATH philip.bath@nottingham.ac.uk
Stroke Association Professor of Stroke Medicine

Katie Robson

Lisa J. Woodhouse

NIKOLA SPRIGG nikola.sprigg@nottingham.ac.uk
Professor of Stroke Medicine

Robert A. Dineen

Stuart J. Pocock



Abstract

Rationale: Antiplatelet agents such as aspirin, clopidogrel and dipyridamole are effective in reducing the risk of recurrence after a stroke. Importantly, the risk of recurrence is highest immediately after the index event while antiplatelets cause bleeding.
Aims and/or hypothesis: The ‘Triple Antiplatelets for Reducing Dependency after Ischaemic Stroke’ (TARDIS) trial is testing whether short-term intensive antiplatelet therapy is safe and effective in reducing the early risk of recurrence as compared with standard guideline-based therapy.
Design: TARDIS is an international multi-center prospective randomized open-label blinded–end-point trial, with funding from the UK Health Technology Assessment program. Patients with acute ischemic stroke or transient ischemic attack are randomized within 48 h to intensive/triple antiplatelet therapy or guideline antiplatelets taken for one-month. Patients or relatives give written informed (proxy) consent and all sites have research ethics approval. Analyses will be done by intention-to-treat.
Study Outcome: The primary outcome is shift in stroke recurrent events and their severity, assessed using the modified Rankin Scale, at three-months.
Discussion: This paper and attachment describe the trial’s statistical analysis plan, as developed from the protocol during recruitment and prior to unblinding of data. The statistical analysis plan contains design and methods for analyses, and unpopulated tables and figures for the primary and baseline publications. The data from the trial will provide the first large-scale randomized evidence for the use of intensive antiplatelet therapy for preventing recurrence after acute stroke and transient ischemic attack.

Journal Article Type Article
Publication Date Apr 2, 2015
Journal International Journal of Stroke
Print ISSN 1747-4930
Electronic ISSN 1747-4949
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 10
Issue 3
APA6 Citation Bath, P. M., Robson, K., Woodhouse, L. J., Sprigg, N., Dineen, R. A., & Pocock, S. J. (2015). Statistical analysis plan for the ‘Triple Antiplatelets for Reducing Dependency after Ischaemic Stroke’ (TARDIS) trial. International Journal of Stroke, 10(3), https://doi.org/10.1111/ijs.12445
DOI https://doi.org/10.1111/ijs.12445
Publisher URL http://onlinelibrary.wiley.com/doi/10.1111/ijs.12445/abstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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