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. 2007 Oct 17;2007(4):CD003905. doi: 10.1002/14651858.CD003905.pub3

4. Endoscopic versus modified open carpal tunnel release.

Reference Symptoms <= 3 months Symptoms > 3 months Return to work / ADL Complications
Eichhorn 2003   Mean overall severity score (scale 1‐6) after > 1 year: ECTR 2.1; mini incision 2.2. Not assessed. None. Recurrences: ECTR 2%, mini‐incision 14%. Need for repeated surgery ECTR 2%, mini‐incision 9%.
Mackenzie 2000 No quantitative data presented. Not assessed. Not assessed. 1 pillar pain in each group.
Rab 2006 At 12 weeks: mean symptom severity score (Levine) ECTR 14.7; modified OCTR 16.8 (P = 0.27). Mean functional status score (Levine) ECTR 10.3; modified OCTR 12.3 (P = 0.16). Pain (VAS) ECTR 0.3; modified OCTR 1.7 (P = 0.10). At 12 months: mean symptom severity score (Levine) ECTR 14.0; modified OCTR 12.8 (P = 0.49). Mean functional status score (Levine) ECTR 11.1; modified OCTR 9.9 (P = 0.39). Pain (VAS) ECTR 0.6; modified OCTR 0.2 (P = 0.43). Not assessed. None.
Wong 2003 Statistically significant difference in reduction of wound pain at 2 and 4 weeks in favour of ECTR, but not after 8 and 16 weeks. At 12 months: complete relief or minimal symptoms ECTR 27/30 hands (90%); modified OCTR 27/29 hands (93%). Preference for ECTR 6, modified OCTR 13; no preference 10. Not Assessed. None.