Medical indications of acupuncture: a systematic review

This study represents a comprehensive analysis of the scientific evidence available on the medical indications of acupuncture, focusing on the 2010-2015 period, a time frame chosen because of the establishment of the STRICTA criteria in 2010, which standardized acupuncture clinical trials. The researchers conducted a rigorous systematic review, analyzing databases such as MEDLINE/PubMed, The Cochrane Library, and the Centre for Reviews and Dissemination, applying rigorous methodological criteria based on the SIGN standards to evaluate the quality of systematic reviews and meta-analyses.

Of an initial total of 707 reviews identified, only 31 met the high methodological quality criteria established by the researchers. This rigorous selection process ensured that only robust scientific evidence was included in the final analysis. The selected reviews covered 12 different medical specialties, demonstrating the broad spectrum of potential applications of acupuncture in modern medicine.

The results revealed that 74% of high-quality reviews (23 of 31) demonstrated some positive effect of acupuncture on the conditions studied. The areas with the most scientific evidence were rheumatology, neurology, and traumatology, followed by obstetrics, gynecology, and psychiatry. The study identified particularly strong evidence for the treatment of conditions related to chronic pain, including headaches, migraines, low back pain, neck pain, and osteoarthritis.

In the area of rheumatology, five high-quality reviews demonstrated significant efficacy of acupuncture. For osteoarthritis, the studies showed clinically relevant reductions in pain and improvements in functional capacity. The meta-analysis by Vickers et al., including 17,922 patients, demonstrated statistically significant differences both when acupuncture was compared with sham acupuncture and with no-treatment controls. For chronic low back pain, 32 studies involving 6,077 patients showed consistent benefits of acupuncture compared with no treatment, medication, and physical therapy.

In neurology, the evidence was especially robust for tension-type headache and migraine. The Vickers et al. review of chronic headache demonstrated efficacy for both migraine and tension-type headache. Additionally, promising evidence was found for epilepsy and Bell's palsy, although based on smaller numbers of studies.

For traumatic brain injury, four studies showed significant improvements in functional capacity measured by standardized scales.

In the area of mental health, two reviews on depression involving 2,812 patients demonstrated that acupuncture was superior to selective serotonin reuptake inhibitors. For schizophrenia, 30 studies with 1,432 patients showed that adding acupuncture to standard antipsychotic treatment resulted in symptom improvements and reduction in hospitalization days.

However, the study also identified areas where the evidence does not support the use of acupuncture. Eight reviews concluded that acupuncture did not demonstrate effects superior to placebo or usual treatment, including conditions such as glaucoma, functional dyspepsia, insomnia, endometriosis, and labor pain.

Limitations of the study include the temporal focus restricted to the post-2010 period, which may have excluded relevant earlier evidence. However, this limitation also represents a strength, as it ensures that only studies following modern methodological standards were included. The authors acknowledge that many reviews were excluded due to low methodological quality, frequently related to small samples, absence of adequate control groups, or lack of randomization.

The study establishes that acupuncture has sufficient scientific evidence to be recommended specifically for chronic pain, including headaches, migraines, low back pain, neck pain, and osteoarthritis. For other conditions, the authors recommend additional studies of higher methodological quality following STRICTA criteria. This research provides a solid basis for clinical decisions and health policies, supporting the integration of acupuncture into treatment protocols for specific conditions with robust evidence.