“…While 2 studies that included 175 patients reported VAS scores that were lower in acupuncture compared with medication at a follow-up time of 1–3 months after treatment (random-effects estimates; MD −1.81, 95%CI −3.42 to −0.20; P -value of the Chi 2 test <0.0001, I 2 = 94%; P -value of Z test = 0.03; very low quality; Figure 3A shows the results; Li, 2017 ; Shu et al, 2017 ). For acupuncture and sham acupuncture,a total of 9 trials that included 409 patients presented VAS scores were lower with acupuncture than with sham acupuncture at a follow-up time of up to 1 month after treatment (random-effects estimates; MD −1.56, 95%CI −2.21 to −0.92; P -value of the Chi 2 test <0.00001, I 2 = 82%; P -value of Z test <0.00001; low quality; Figure 3B shows the results; Chen, 2009 ; Jiang, 2011 ; Jiang et al, 2011 ; Zhao, 2011 ; Gao, 2012 ; Wan et al, 2013 ; Wu, 2014 ; Zhang, 2014 ; Wang et al, 2015 ; Liang et al, 2016 ).…”