The effectiveness of electroacupuncture in the treatment of cancer-related fatigue: a systematic review

INTRODUCTION: Cancer-related fatigue (CRF) is a frequent, subjective, and difficult-to-manage symptom, for which few interventions have proven effective. Recent evidence suggests that electroacupuncture (EA) can reduce fatigue, although specific studies on this technique remain scarce. OBJECTIVE: To evaluate the efficacy of EA in treating CRF in cancer patients. METHODS: A systematic review registered in PROSPERO was conducted, including clinical trials assessing the effects of EA in patients with CRF. Searches were performed in the PubMed, Embase, Virtual Health Library, Scopus, and CAPES databases, with no restrictions on date, language, sex, ethnicity, or type of cancer. We assessed the methodological quality using the PEDro scale and evaluated the risk of bias using the RoB-2 tool. RESULTS: A total of 2,110 studies were identified. After applying inclusion criteria, five trials were included: three randomized, one non-randomized, and one single-arm clinical trial. In total, 251 patients were analyzed, 132 of whom received EA treatment. Interventions varied from two to three weekly sessions, each lasting 20 to 30 minutes, over a period of four to eight weeks. Acupuncture points and electrical frequencies (0.2-25 Hz) differed between studies. Outcomes were measured by the Brief Fatigue Inventory, Functional Assessment of Cancer Therapy - Fatigue, and European Organization for Research and Treatment of Cancer Quality of Life Questionnaire. Despite the potential benefits observed in EA-treated groups, the findings remain inconsistent. CONCLUSION: EA shows promising therapeutic potential for managing CRF. However, the small number of studies, methodological heterogeneity, and small sample sizes limit generalizability. Multicenter clinical trials with larger samples and standardized protocols are needed to confirm efficacy.