Statistical analysis plan for the ‘Pharyngeal electrical stimulation for acute stroke dysphagia trial’ (PhEAST) (ISRCTN98886991)

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ABSTRACT Introduction Post stroke dysphagia is common, associated with poor functional outcome and lacks treatment strategies beyond behaviour therapies delivered by speech & language therapists. Here, we present the statistical analysis plan for the ongoing pharyngeal electrical stimulation for acute stroke dysphagia trial (PhEAST). PES is a candidate treatment for dysphagia present in non-ventilated stroke patients. Methods PhEAST is an investigator-initiated international prospective randomised open-label blinded-endpoint phase-4 superiority trial involving 650 participants with tube-dependent post-stroke dysphagia. Consenting patients are randomised to PES versus no PES given on top of standard care with PES given daily for 6 days. The primary outcome is the dysphagia severity rating scale (DSR.S), a measure of swallowing impairment, made at days 14 and 90 and analysed using repeated measures regression. Conclusion We present the statistical analysis plan for the main analyses based on data up to day 90 along with planned secondary analyses including presentation of baseline data, health economics, cognition and extended follow-up to 12 months.

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