Acupuncture in chronic aspecific low back pain: a Bayesian network meta-analysis

Chronic low back pain is one of the most prevalent health problems today, affecting about 80% of the population over a lifetime and generating considerable economic and social impact. In most cases, this pain is considered non-specific — that is, no specific anatomical cause can be identified. Traditional management involves physical therapy as a first-line option, followed by anti-inflammatory medications and, in more severe cases, opioids. However, medication side effects and the risk of opioid dependence have driven increasing interest in safe and effective alternatives.

In this context, acupuncture has emerged as a promising therapeutic option, but different acupuncture protocols have been proposed, raising questions about which is most effective.

This groundbreaking study used a sophisticated methodology called Bayesian network meta-analysis to compare different types of acupuncture in the treatment of chronic non-specific low back pain. The researchers conducted a systematic search of four major scientific databases, analyzing studies published through March 2022. Only high-quality randomized clinical trials comparing two or more acupuncture modalities in adult patients with chronic low back pain for at least 1.5 months — or with at least three episodes in the previous 12 months — were included. Treatment efficacy was measured using two standardized scales: the Visual Analog Scale for pain and the Roland Morris Disability Questionnaire to assess functional limitations.

The researchers compared different approaches: individualized acupuncture, standardized acupuncture, acupuncture combined with transcutaneous electrical nerve stimulation, electroacupuncture, auricular acupuncture, and sham acupuncture.

The results are impressive and are based on the analysis of 44 clinical trials involving 8,338 procedures. The study population had a mean age of 48 years, was 56% female, and had a mean body mass index of 26.3 kg/m². The most significant findings showed that real acupuncture is clearly superior to sham treatment, scientifically confirming the efficacy of this ancient therapy. More specifically, two protocols stood out as most effective: individualized acupuncture and standardized acupuncture combined with transcutaneous electrical nerve stimulation.

Both treatments demonstrated the largest improvements in both pain reduction and patient quality of life. Individualized acupuncture, in which the practitioner selects specific points for each patient based on a personalized assessment grounded in traditional Chinese medicine principles, was particularly effective. This suggests that accurate diagnosis and specific point selection are fundamental to treatment success.

These findings have important practical implications for both patients and healthcare professionals. For patients with chronic low back pain, the results offer robust scientific evidence that acupuncture is a legitimate and effective therapeutic option, especially when other treatments have not provided adequate relief. The superiority of individualized acupuncture suggests that seeking practitioners experienced in traditional Chinese medicine, capable of personalized diagnoses, can lead to better outcomes. For healthcare professionals — including physicians, physical therapists, and other pain specialists — this study provides scientific support for recommending acupuncture as part of an integrated approach to chronic low back pain management.

Current clinical guidelines already recognize acupuncture as a first-line non-pharmacological option, and these results reinforce that recommendation. In addition, combining acupuncture with transcutaneous electrical stimulation may be a particularly promising strategy for more complex cases.

It is important to acknowledge the limitations of this research. The main limitation concerns the heterogeneity of protocols used across the analyzed studies, which may have influenced the results. Although the risk of selection bias was low because of the randomized design of included studies, some did not adequately blind patients and practitioners, which may have affected the objectivity of the results. Other limitations include the lack of data on participants' general health characteristics, prior symptom duration, and conservative strategies previously used.

Heterogeneity also made it impossible to analyze the effects of combining acupuncture with other treatments such as medications, physical therapy, and psychotherapy. Specific techniques such as moxibustion and cupping were excluded because of insufficient data, and the study focused only on patients younger than 75 years, limiting applicability to older adults.

In conclusion, this study represents an important milestone in acupuncture research for chronic low back pain, providing high-quality scientific evidence on the efficacy of different protocols. Results clearly demonstrate that real acupuncture is superior to sham treatment, scientifically validating this ancient therapy. Among the different approaches, individualized acupuncture and acupuncture combined with electrical stimulation stood out as the most effective, offering real hope for millions of people suffering from chronic low back pain. These findings not only support current guidelines that recommend acupuncture as a first-line treatment, but also help patients and practitioners understand which approaches may yield the best results.

Future research should focus on protocol standardization and on investigating therapeutic combinations to further optimize the benefits of this ancient healing art in the context of modern medicine.