Park 2016b.

Methods	Randomisation by randomly selected envelopes containing a code specifying the group Outcomes partially blinded (for VFSS only but not for sEMG evaluation)
Participants	1 centre in Korea 33 participants with dysphagia (inclusion criteria states stroke onset within 6 months) Dysphagia confirmed by videofluoroscopy Baseline demographics and prognostic factors balanced
Interventions	Rx: EMST with a 70% threshold value of maximal expiratory pressure, using an EMST device C: training with sham device Treatment for 4 weeks
Outcomes	Swallow function using VFSS, PAS, Functional Oral Intake Scale
Notes	Exclusion: stroke before that resulting in dysphagia; severe oro‐facial pain including trigeminal neuropathy; significant malocclusion or facial asymmetry; unstable breathing and pulse; tracheostomy; severe communication disorder such as severe aphasia; inadequate lip closure
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomisation by randomly selected envelopes containing a code specifying the group
Allocation concealment (selection bias)	Low risk	Concealed by coded envelopes
Blinding (performance bias and detection bias) All outcomes	Unclear risk	Participant blinding unclear
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Unclear
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Outcomes partially blinded (surface EMG evaluation not blinded; however this outcome not relevant in this review)
Incomplete outcome data (attrition bias) All outcomes	High risk	6 participants lost to follow‐up
Selective reporting (reporting bias)	Low risk	All outcomes reported
Other bias	Low risk	None identified