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Acupuncture for osteoarthritis of the knee: a systematic review
Objective:
To evaluate trials of acupuncture for osteoarthritis (OA) of the knee, to assess the methodologic quality of the trials and determine whether low-quality trials are associated with positive outcomes, to document adverse effects, to identify patient or treatment characteristics associated with positive response, and to identify areas of future research.
Methods:
Eight databases and 62 conference abstract series were searched. Randomized or quasi-randomized trials of all languages were included and evaluated for methodologic quality using the Jadad scale. Outcomes were pain, function, global improvement, and imaging. Data could not be pooled; therefore, a best-evidence synthesis was performed to determine the strength of evidence by control group. The adequacy of the acupuncture procedure was assessed by 2 acupuncturists trained in treating OA and blinded to study results.
Results:
Seven trials representing 393 patients with knee OA were identified. For pain and function, there was limited evidence that acupuncture is more effective than being on a waiting list for treatment or having treatment as usual. For pain, there was strong evidence that real acupuncture is more effective than sham acupuncture; however, for function, there was inconclusive evidence that real acupuncture is more effective than sham acupuncture. There was insufficient evidence to determine whether the efficacy of acupuncture is similar to that of other treatments.
Conclusion:
The existing evidence suggests that acupuncture may play a role in the treatment of knee OA. Future research should define an optimal acupuncture treatment, measure quality of life, and assess acupuncture combined with other modalities.
Insights
Acupuncture shows promise for knee osteoarthritis (OA) pain relief, with strong evidence supporting its effectiveness over sham treatments. Further research is needed to optimize acupuncture protocols for OA management.
Area of Science:
- Integrative Medicine
- Rheumatology
- Pain Management
Background:
- Osteoarthritis (OA) of the knee is a prevalent degenerative joint disease causing pain and functional limitation.
- Current management strategies for knee OA often include pharmacologic and non-pharmacologic interventions.
- Acupuncture is a complementary therapy explored for symptomatic relief in knee OA.
Purpose of the Study:
- To critically evaluate existing randomized controlled trials (RCTs) of acupuncture for knee OA.
- To assess the methodological quality of these trials and its impact on reported outcomes.
- To document adverse events and identify factors influencing treatment response.
Main Methods:
- A comprehensive literature search was conducted across multiple databases and conference abstracts.
- Included were randomized and quasi-randomized trials in any language, assessed using the Jadad scale.
- A best-evidence synthesis approach was employed due to inability to pool data, with expert acupuncturists evaluating procedure adequacy.
Main Results:
- Seven trials involving 393 patients with knee OA were analyzed.
- Limited evidence suggests acupuncture is superior to waiting list or usual care for pain and function.
- Strong evidence indicates real acupuncture is more effective than sham acupuncture for pain, but evidence for function is inconclusive.
Conclusions:
- Acupuncture may offer a beneficial role in managing knee osteoarthritis.
- Further research is recommended to establish optimal acupuncture protocols, assess quality of life, and explore combination therapies.