Koskella 1996.

Methods	RCT
Participants	17 hands in 16 people (mean age 50.4) were assessed (9 OCTR, 8 ECTR). CTS was confirmed electrophysiologically. No information on sex
Interventions	1‐portal ECTR vs OCTR
Outcomes	Follow‐up at 3 and 6 weeks and 3, 6 and 12 months Functional outcome, grip, pinch, 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
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 on baseline differences or on financial support or conflicts of interest