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Does Syndrome Differentiation Matter? A Meta-Analysis of Randomized Controlled Trials in Cochrane Reviews of
Huijuan Cao1, Suzannah Bourchier2, Jianping Liu1
1Center for Evidence-Based Chinese Medicine of Beijing University of Chinese Medicine , Beijing, China .
Background:
One of the basic and important principles of Traditional Chinese Medicine theory is syndrome differentiation, which is widely utilized for individual diagnosis and in the application of acupuncture treatment. However, the impact of syndrome differentiation on therapeutic effect is unclear because of insufficient supportive clinical evidence.
Objective:
The aim of this study was to analyze current Cochrane Database systematic reviews of acupuncture and to evaluate differences in therapeutic effects of acupuncture treatment when syndrome differentiation is utilized, compared to when this approach is not utilized.
Methods:
Cochrane Database systematic reviews of acupuncture were included if the reviews had sufficient data to perform subgroup analyses by syndrome differentiation applied during acupoints' selection. Searching was conducted across all available articles of the Cochrane Library, and the search concluded in July 2011.
Results:
Forty-four trials from five Cochrane reviews were included in 10 subgroup meta-analyses. Seven meta-analyses showed that there were no differences between trials using fixed acupoints prescriptions and trials using individualized treatment based on relevant symptom improvements in cases of acute stroke, depression, epilepsy, migraine, and peripheral joint osteoarthritis (OA). The remaining 3 meta-analyses showed that acupuncture with fixed prescriptions was superior to individualized acupuncture for pain relief of peripheral joint OA, compared to sham control.
Conclusions:
The available evidence showed no significant difference between acupuncture treatment with or without syndrome differentiation. Large, well-designed trials are warranted to address the use of syndrome differentiation for specific diseases or conditions in order to confirm if there are any advantages of using syndrome differentiation to achieve better therapeutic effects with acupuncture.
