Schwandner 2011.

Methods	Multicentre randomised trial, open parallel group design.
Participants	Anal incontinence of Grade 1 or higher, 18% had endosonographically diagnosed sphincter damage
Interventions	80 participants. 1. "Triple target training": amplitude‐modulated middle‐frequency electrical stimulation with current amplitude high enough to achieve perineal contraction plus electromyographic (EMG) biofeedback and EMG‐controlled exercises 39 participants. 2. Standard treatment low frequency electrical stimulation 41 participants.
Outcomes	Cleveland clinic score, proportion of patients regaining continence, quality of life
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomisation performed centrally by telephone
Allocation concealment (selection bias)	Low risk	Randomisation performed centrally by telephone
Blinding (performance bias and detection bias) All outcomes	Low risk	Blinded observer