Acupuncture for Major Depressive Disorder: A Systematic Review.

Major depressive disorder (MDD) is a prevalent condition associated with significant burden in terms of reduced quality of life, lower productivity, increased prevalence of other conditions and increased health care costs. We conducted a systematic review and qualitative summary of randomized controlled trials (RCTs) that assessed the effectiveness and safety of acupuncture for the treatment of MDD. We searched the databases PubMed, CINAHL, PsycINFO, Web of Science, Embase, CDSR, CENTRAL, clinicaltrials.gov, DARE, and PILOTS for English-language RCTs published through January 2015. Two independent reviewers screened the identified literature against inclusion and exclusion criteria, abstracted study level data, and assessed the risk of bias and methodological quality of included studies. The quality of the evidence was assessed using GRADE. Eighteen studies met inclusion criteria. Eleven assessed acupuncture as monotherapy, seven as adjunct depression treatment. Intervention approaches and comparators varied. Evidence on the effectiveness and comparative effectiveness of acupuncture to treat MDD for the outcomes depression improvement, measured as scale score differences and the number of responders, is very weak. Acupuncture may be superior to waitlist (low quality of evidence) but findings for effect estimates compared to other comparators are inconclusive. Few studies reported on patients achieving remission. The effect of acupuncture on relapse rates could not be determined. Too few studies assessed quality of life to estimate treatment effects. Reported adverse events were typically mild in nature, but the assessment lacked rigor and studies were not designed to detect rare events.