In the end, no study published has proved that acupuncture is more efficient than nothing at all. I dare you to find any article on pubmed, medline, NEJM saying otherwise.
Take a look on this abstract: Is acupuncture effective for the treatment of chronic pain: a systematic review (Structured abstract)
tinyurl . com / aruoxgx
Another one, search "PUBMED 279244" on google and read it