Giele 2000.

Methods	RCT in participants with bilateral CTS
Participants	60 participants (120 hands) were assessed. Participants with bilateral CTS underwent surgery simultaneously in both hands) Average age was 51 years (range 27 to 91 years), 12 men, 38 women
Interventions	ECTR vs OCTR
Outcomes	Follow‐up at 12 days and 4, 8 and 12 weeks "Symptoms", "signs", 2‐point discrimination, pinch and grip strength, complications
Notes	Abstract
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No information given
Allocation concealment (selection bias)	Unclear risk	No information given
Blinding of participants and personnel (performance bias) All outcomes	High risk	No information given. Participants and personnel could not be blinded. (Report states, "the patients were blinded to the randomisation" but this does not clarify.)
Blinding of outcome assessment (detection bias) All outcomes	High risk	No information given. Participants and personnel could not be blinded
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No information given
Selective reporting (reporting bias)	Unclear risk	Insufficient information given
Other bias	Unclear risk	No information given for baseline differences or for funding or conflicts of interest