Background
Spinal manipulation therapy (SMT) and acupuncture are commonly used for low back pain (LBP) among complementary and alternative therapies. However, it remains unclear which of the two therapies is more effective for LBP. Therefore, the purpose of this meta-analysis was to evaluate the effectiveness of SMT and acupuncture on LBP.
Methods
Four electronic databases were searched for randomized controlled trials (all years until July 2021), including PubMed, Embase, Web of Science, and Cochrane Library. Two reviewers independently abstracted data, assessed risk of bias, and rated the quality of evidence. The primary outcome was pain; secondary outcomes included functional status and adverse events. Review Manager 5.3 software and Stata 12.0 were used for all statistical analyses.
Results
9 RCTs with a total of 714 participants were identified, who were on average middle aged (39-60 years) without signs of radiating pain. These trials included patients with mild to moderate pain. Overall, moderate quality of evidence suggested that SMT had better effects for pain relief (MD: 0.32, 95%CI: 0.09 to 0.55, I2=34%) and similar effects in function (MD: 0.24, 95%CI: -0.45 to 0.94, I2=21%) when compared to acupuncture. Moderate quality of evidence showed SMT reduced pain better than acupuncture at month 2 (MD: 0.61, 95%CI: 0.08 to 1.14, I2=0%) and at month 12 (MD: 1.02, 95%CI: 0.28 to 1.75, I2=42%). In addition, Low quality of evidence showed SMT may provide better improvement in pain at month 3 (MD: 0.74, 95%CI: 0.09 to 1.39, I2=42%) and in function at month 4 (MD: 3.50, 95%CI: 0.71 to 6.29). Adverse events associated with SMT and acupuncture were rare and mild.
Conclusions
SMT showed better effects than acupuncture for chronic low back pain, while SMT and acupuncture had similar effects in functional improvement. Although SMT and acupuncture were tolerable and safe, patients should be informed about the potential risks of adverse events before starting therapy.