Auricular acupuncture for obesity: a systematic review and meta-analysis

Introduction: The randomized controlled trials (RCTs) of auricular acupuncture/auricular acupressure (AA) on weight loss were studies for decades. However no systematic review and meta-analysis about this approach was reported. Methods: 22 electronic databases were used to search for RCTs of AA on weight loss up to August 2015 without language restrictions. RCTs for the sole AA, AA combining diet and/or exercise were involved. Studies’ methodological qualities were assessed using bias of risks in the Cochrane handbook. Pooling of data statistic was performed using a fixed effects model while no heterogeneity existed. Results: Nine RCTs meeting the inclusion criteria were analyzed. The sole AA intervention compared to no treatment or sham AA performed no statistical difference (pooled MD = -0.40 kg, 95% CI = -0.95 to 0.15, I2 = 0%). AA plus diet was more effective than the sole diet intervention (MD = -0.60, 95% CI = -1.12 to -0.08, I2 = 6%). Furthermore AA plus diet and exercise performed better effect than diet plus exercise (MD = -0.60, 95% CI = -1.12 to -0.08, I2 = 0%). AA appeared to be associated with few adverse events reports. Conclusion: This systematic review and meta-analysis suggests the sole AA represents less effect on bodyweight management, but AA plus diet, or AA plus diet plus exercise indeed take more effect comparing with the diet or diet plus exercise.