Atroshi 2006.

Methods	RCT
Participants	Employed participants only. Mean age 44 (25 to 59) years. 75% female. Mean duration of symptoms 36 (3 to 240) months. Electrophysiologically confirmed CTS, idiopathic CTS. Patients with CTS symptoms of the contralateral hand not relieved by a splint were excluded.
Interventions	(1) ECTR: two‐portal extrabursal Chow technique (65 patients). (2) OCTR (63 patients).
Outcomes	Severity of postoperative pain and limitations. Symptom severity score. Functional status score. Length of work absence. SF‐12 physical health score. Changes in hand sensation and strength.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Low risk	A ‐ Adequate