| | Authors | Published years | Study design | Number of patients | Age (year) | Disease duration | Interventions | | Observation group | Control group | Observation group | Control group | Observation group | Control group | Observation group (acupuncture) | Control group (sham acupuncture) |
| | Tu et al. [9] | 2019 | RCT | 26 | 25 | | | | | Acupuncture, acupoint selection GV20 (Baihui), CV12 (Zhongwan), CV6 (Qihai), CV17 (Danzhong), ST25 (Tianshu), PC6 (Neiguan), ST36 (Zusanli), and SP4 (Gongsun). | Sham acupuncture, nonacupoints | | Stanghellini et al. [12] | 2021 | RCT | 138 | 140 | | | | | Acupuncture, acupoint selection GV20 (Baihui), CV12 (Zhongwan), CV6 (Qihai), CV17 (Danzhong), ST25 (Tianshu), PC6 (Neiguan), ST36 (Zusanli), and SP4 (Gongsun). | Sham acupuncture, nonacupoints | | Kim et al. [8] | 2015 | RCT | 79 | 71 | | | | | Acupuncture, acupoint selection ST42 (Chongyang), ST40 (Fonglong), ST36 (Zusanli), and ST34 (Liangqiu) | Sham acupuncture, nonacupoints | | Kim et al. [8] | 2015 | RCT | 82 | 71 | | | | | Acupuncture, acupoint selection ST38 (Tiaokou), ST35 (Dubi), ST33 (Yinshi), and ST32 (Futu) | Sham acupuncture, nonacupoints | | Kim et al. [8] | 2015 | RCT | 74 | 71 | | | | | Acupuncture, acupoint selectionBL21 (Weishu) and CV12 (Zhongwan) | Sham acupuncture, nonacupoints | | Kim et al. [8] | 2015 | RCT | 85 | 71 | | | | | Acupuncture, acupoint selection GB40 (Qiuxu), GB37 (Guangming), GB36 (Waiqiu), and GB34 (Yanglingquan) | Sham acupuncture, nonacupoints | | Yang et al. [10] | 2020 | RCT | 21 | 21 | | | | | Acupuncture, acupoint selection GV20 (Baihui), CV12 (Zhongwan), CV6 (Qihai), CV17 (Danzhong), ST25 (Tianshu), PC6 (Neiguan), ST36 (Zusanli), and SP4 (Gongsun). | Sham acupuncture, nonacupoints | | Wang et al. [11] | 2020 | RCT | 138 | 140 | | | | | Acupuncture, acupoint selection GV20 (Baihui), CV12 (Zhongwan), CV6 (Qihai), CV17 (Danzhong), ST25 (Tianshu), PC6 (Neiguan), ST36 (Zusanli), and SP4 (Gongsun). | Sham acupuncture, nonacupoints |
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