Jayasekeran 2010a.

Methods	Dose comparison protocol (only data from the group that were stimulated once a day over 3 days were included) Computerised randomisation by minimisation Blinded outcome measures Balancing of prognostic baseline factors between treatment groups unclear
Participants	1 centre in UK 10 participants with acute anterior circulation cerebral infarct (< 3 weeks) Mean age 73 years
Interventions	Rx: bedside pharyngeal electrical stimulation C: sham stimulation Duration: once daily for 3 consecutive days
Outcomes	Airway aspiration at 2 weeks' post intervention
Notes	Exclusion: dementia, pacemaker or implantable cardiac defibrillator, severe receptive aphasia, unstable cardiopulmonary status, distorted oropharyngeal anatomy (e.g. pharyngeal pouch), brainstem stroke, dysphagia resulting from conditions other than hemispheric stroke
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computerised randomisation by minimisation
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding (performance bias and detection bias) All outcomes	Unclear risk	Unclear
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Unclear
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Blinded outcome measures
Incomplete outcome data (attrition bias) All outcomes	Low risk	None lost to follow‐up
Selective reporting (reporting bias)	Low risk	All outcomes reported
Other bias	Low risk	None identified