Lim 2009.

Methods	Method of randomisation unclear: participants divided into 2 groups according to order of enrolment Blinding of outcomes unclear Analysis by ITT unclear Balancing of prognostic baseline factors between treatment groups ‐ not reported for dysphagia severity, only for previous treatment of pneumonia
Participants	1 centre in Korea 22 participants with CT or MRI confirmed stroke < 6 months from onset Mean age 64 years
Interventions	Rx: neuromuscular electrical stimulation + thermal‐tactile stimulation (n = 13) C: thermal‐tactile stimulation (n = 9)
Outcomes	Swallow function scoring system, PAS and PTT
Notes	Exclusions: inability to receive treatment for 1 hour, neurological disease other than stroke, combined behavioural disorder that interfered with administration of therapy, current illness or upper gastrointestinal disease, inability to give informed consent because of cognitive impairment or receptive aphasia
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Participants divided into 2 groups according to order of enrolment
Allocation concealment (selection bias)	High risk	Not concealed
Blinding (performance bias and detection bias) All outcomes	Unclear risk	No details available
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No details available
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Doctor blinded to groups performed videofluoroscopic examination; measured PTT as well as swallow function scoring system and Rosenbek penetration aspiration scale.
Incomplete outcome data (attrition bias) All outcomes	High risk	36 enrolled to the study. Only 28 participants completed the study (16 in the experimental group and 12 in the control group)
Selective reporting (reporting bias)	Unclear risk	Swallow scores not fully reported (unclear on the range of median values)
Other bias	Low risk	None identified