Methodology: The researchers executed a systematic review on multiple databases such as MEDLINE, Embase, CINAHL, PsycINFO, and Cochrane Central Register of Controlled Trials covering a period from 1990 to 2015. Their search was focused on identifying responsive randomized controlled trials, cohort studies, and case-control studies which focused on the effectiveness and safety of acupuncture therapies for musculoskeletal disorders. The Scottish Intercollegiate Guidelines Network criteria was used to evaluate the eligible studies. Furthermore, best-evidence synthesis was performed to sum up results from studies with low bias risk. A sensitivity analysis was also performed to comprehend the potential impact of excluding studies with high bias risk.

Results: The comprehensive review identified 5180 articles, from which 15 were selected for final analysis (10 had a low risk of bias and 5 with a high risk of bias). Among other findings, the results showed that traditional needle acupuncture may outperform oral steroids and vitamin B1/B6 supplements for carpal tunnel syndrome and exercises for Achilles tendinopathy. Moreover, electroacupuncture might be superior than placebo for shoulder injuries. The extent of benefits offered by dry needling for plantar fasciitis remained equivocal. Traditional needle acupuncture didn't show significant advantage over placebo for upper extremity pain, or no intervention for patellofemoral pain, and findings for shoulder pain were inconclusive.