Trumble 2002.

Methods	RCT
Participants	Mean age 56 (24 to 74) years. 65% female. Mean duration of symptoms 32 (4 to 132) months. Electrophysiologically confirmed CTS, idiopathic CTS, 45 of 147 patients treated bilaterally.
Interventions	(1) ECTR: one‐portal Agee technique (75 patients, 97 hands). (2) OCTR (72 patients, 95 hands).
Outcomes	Patient's satisfaction score. Symptom severity score. Functional status score. Complications.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear