Table 2. Descriptions of acupuncture interventions.
| Study ID | Acupuncture stimulation method | Needle type | Acupuncture point | Retention time | Treatment regimen | Practitioner background |
|---|---|---|---|---|---|---|
| Yao 2015 [15] | MA | NR | BL1,EX-HN7,GB1, LR3,ST1,shangming, jianming | NR | 1 session every 2 days for 21 days | NR |
| Yang 2019 [16] | MA | NR | BL2,BL23,EX-HN5,EX-HN7,L14,L20,SP6, ST36 | 30min | 1 session every day for 3 months | NR |
| Wang 2019 [17] | MA | NR | BL1,EX-HN5,GB1, GB37, K16, L14, LI11,ST36,ST40 | 30min | 2 sessions a week for 2 months | NR |
| liu 2016 [18] | MA | 0.25×25 mm | BL1,BL2, EX-HN1, GB1 | 30min | 1 session every day for 30 days | NR |
| Xia 2014 [25] | MA | 0.25×(40–50) mm | BL1,BL2, EX-HN5, EX-HN14,GB20,ST1 | / | 2 session a week for 2 months | NR |
| Wang 2017 [26] | MA | 0.25×25 mm | BL1,BL2,BL24,BL26,CV9,DU20,EX-HN4,EX-HN5,EX-HN7,GB14,GB37,K13, LR3, SP6, SP10, ST1,ST36,ST40, shangming | 30min | 1 session every day for 30 days | NR |
| Qin 2020 [27] | MA | NR | BL10,EX-HN5,GB20,SJ23,ST1,xinming | 20min | 1 session every day for 20 days | NR |
| Xia 2013 [28] | MA | 0.25×(40/50) mm | BL1,EX-HN7, GB1, LR3, ST1 | 30min | 2 sessions a week for 2 months | NR |
| Jiao 2011 [29] | MA | 0.25×(25–50) mm | BL1,BL2,BL18,BL20,BL23,EX-HN5,GB1,GB14,GB20,GB37, ST2, ST40 | 30min | 1 session every day for 50 days | NR |
MA, manual acupuncture; NR, not reported.