Vasant 2016.

Methods	Computerised randomisation Single‐blind trial; outcomes assessed by blinded therapist Analysis by ITT
Participants	3 centres in UK 36 participants; 22 men All dysphagia identified by bedside screening swallow test and videofluoroscopy Baseline characteristics reported as similar 1 participant withdrawn and lost to follow‐up Baseline prognostic factors similar between groups
Interventions	Rx: pharyngeal electrical stimulation n = 18 C: sham n = 18 Duration: 3 days Follow‐up: 3 months
Outcomes	Death, swallow function, dysphagia
Notes	Exclusions: advanced dementia, other neurological conditions that may explain dysphagia, previous history of dysphagia, presence of cardiac pacemaker or implanted cardiac defibrillator, diagnosis other than stroke (e.g. brain tumour), significant structural abnormalities of the mouth or throat and requiring continuous oxygen treatment
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomisation through a concealed computer programme
Allocation concealment (selection bias)	Low risk	Concealed via a computerised programme
Blinding (performance bias and detection bias) All outcomes	Low risk	Researcher delivering the intervention not blinded
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Participants and assessors blinded to group allocation
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Outcome assessors blinded
Incomplete outcome data (attrition bias) All outcomes	Low risk	1 participant lost to follow‐up (withdrawn), 2 participants (1 from each group) died before follow‐up at 3 months
Selective reporting (reporting bias)	Low risk	All outcomes reported
Other bias	Low risk	None identified