| | First author and publication year | Publication language | No. of RCTs(No. of patients) included | Quality assessment scales of the original studies | Interventions | Outcomes | | Nature of acupuncture | Nature of control interventions |
| | Cheong YC, 2013 | English | 20(4544) | Risk of bias | EA∖MA∖AA | no treatment, placebo or sham acupuncture | (1),(2),(3),(4),(5), | | Junyong Jo, 2017 | English | 4(430) | Risk of bias | EA∖MA | no treatment | (1),(2),(3),(5) | | Zheng CH, 2012 | English | 24(5807) | Risk of bias | MA∖EA∖LA | no treatment, placebo or sham acupuncture | (1),(2),(3),(4),(5), | | Fan Qu, 2012 | English | 17(3744) | Risk of bias (Cochrane Review Groups 2006) | MA∖EA∖LA∖AA | no treatment, placebo or sham acupuncture | (1),(2),(3),(4) | | Eric M, 2013 | English | 16(4038) | Risk of bias(Cochrane Collaboration 2011) | MA | sham acupuncture, no treatment | (1),(2),(3), | | Tarek ET, 2009 | English | 14(2870) | Risk of bias | MA∖EA∖LA | sham acupuncture, no treatment | (1) | | Shen CJ, 2015 | English | 21(5428) | Risk of bias | MA∖EA∖LA | no treatment, placebo or sham acupuncture | (1) | | Qian Y, 2017 | English | 30(6344) | Risk of bias | MA∖EA∖LA∖AA | no treatment, placebo or sham acupuncture | (1),(2),(3) | | Yang HS, 2017 | Chinese | 32(4815) | Risk of bias | MA∖EA∖WN | no treatment, placebo or sham acupuncture | (1),(3) | | YU J, 2009 | Chinese | 10(2046) | Modified Jadad scale | MA∖EA∖AA | no treatment, placebo or sham acupuncture | (1),(2),(3) | | Fu SJ, 2016 | Chinese | 22(4553) | Risk of bias | MA∖EA∖AA∖WN | no treatment, placebo or sham acupuncture | (1),(2),(3),(4) |
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