Need data on the effectiveness of carpal tunnel release surgery?

Very effective. Carpal tunnel syndrome is a very effective treatment for people with carpal tunnel syndrome (cts). Failures are usually do to incorrect diagnosis, such as cervical radiculopathy or diabetes, or incomplete surgical release of the transverse carpal ligament. When the right surgery is done for the right reason, the results are excellent. Try the hand society web site assh. Org for more details.
77% good results. Dr Coats is absolutely right that when the right operation is done in the right patient the results are usually excellent but that is not real life. We surveyed 6263 patients after routine carpal tunnel decompression in the UK - all cases, not those selected by a specialist with an interest in CTS - and 77% reported themselves either completely cured or greatly improved. 7% were worse!