The efficacy of acupuncture for depression-associated chronic pain: a systematic review and meta-analysis

The comorbidity of pain and depression is prevalent, adding difficulty to the treatment of depression. This systematic review with meta-analysis aims to determine the efficacy and safety of acupuncture in treating depression-associated chronic pain (DACP).

A comprehensive search was conducted across four international databases, namely PubMed, Embase, Web of Science, and the Cochrane Library, along with four regional databases, including Wanfang Data, CNKI, VIP database, and SinoMed, from inception to March 2025. The Cochrane Risk of Bias 2 tool was utilized to assess risk of bias in the included research articles, and the Grading of Recommendations Assessment, Development, and Evaluations system was employed to evaluate the certainty of evidence. Meta-regression analysis was performed to explore the influence of patient age and treatment duration on the study results, and sensitivity analysis was used to verify the stability of the results. The publication bias was evaluated when the number of included studies exceeded ten. All data analyses were completed using Stata15.1.

Ten randomized controlled trials involving 761 participants were included. Acupuncture combined with conventional medications was more effective than medication alone in improving depressive symptoms (standardized mean difference (SMD): -0.72; 95% confidence interval (CI): -0.91 to -0.53; P < 0.01) and reducing pain (SMD: -0.85; 95% CI: -1.36 to -0.34; P < 0.01). Head-to-head comparisons revealed that acupuncture is similar to medication in improving the Hamilton Depression Rating Scale scores (SMD: -0.05; 95% CI: -0.61 to 0.51; P > 0.05) and the Visual Analogue Scale scores (SMD: -0.33; 95% CI: -0.94 to 0.29; P > 0.05), suggesting no statistically significant difference between the two treatments. In contrast, acupuncture was associated with a better safety profile (relative risk: 0.40; 95% CI: 0.27 to 0.60). Further subgroup analysis found the advantage of a 4-week acupuncture treatment in improving depressive symptoms, while longer-term treatment tended to be more effective in relieving pain.

Acupuncture appears to have comparable antidepressant and analgesic effects to conventional oral medications. When applied as an adjuvant therapy, acupuncture may enhance the clinical efficacy of monotherapy for DACP. Regarding treatment duration, a 4-week acupuncture intervention may be superior to a longer cycle (> 4 weeks) in alleviating depressive symptoms, while long-term acupuncture treatment may provide greater benefits in analgesia.

https://www.crd.york.ac.uk/PROSPERO, identifier CRD420251026454.