Table 4. Electro-Acupuncture Treatment Schemes of the Treatment Group

Author(year)	Acupoints	Type of EA	Type of EA	Frequency of EA	Intensity	Duration	Treatment Frequency	Total session(s)/cycle(c)
Luo(2024)28)	TE18, TE21, GB2, SI19	6805-D type electroacupuncture instrument	Dispersing-dense wave	2/50 ㎐	patient's tolerance	30m	once daily	10s
Zhang(2024)29)	GV14, GB20, Blood Supply Point(供血), EX-B2, SI19, TE17	SDZ-II B	Dispersing-dense wave	4 ㎐	patient's tolerance	30m	3 times a week	18s
Tao(2023)31)	Mastoid 1, 2 / GB20, Blood Supply Point(供血)	KWD-808I	Continuous wave	2 ㎐	patient's tolerance	30m	once daily	18s / 3c
								1c=daily session for 6d followed by 1d break
Jiang(2021)34)	TE21, TE17, GB2	SDZ-V	T1, T2: Continuous waveT3: Dispersing-dense wave	T1: 2 ㎐T2: 50 ㎐T3: 2/50 ㎐	patient's tolerance	30m	once daily	20s
Zhang(2020)36)	SI19, GB2, TE21	G6805-II device	Continuous wave	NR	patient's tolerance	30m	once daily	10s/2c
								1c=daily session for 5d followed by 2d break
Sheng(2020)37)	GB20, Blood Supply Point(供血)	KWD-808I	Continuous wave	2 ㎐	patient's tolerance	30m	once daily	24s/4c
								1c=daily session for 6d followed by 1d break
Guo(2016)45)	TE21, SI19, GB2, TE17, LI4, TE3	NR	NR	NR	patient's tolerance	30m	once daily	15s
Liang(2014)49)	TE21, GB2, SI19, TE17	NR	NR	NR	patient's tolerance	20m	once daily	20s/2c
								1c=daily session for 10d followed by 2d break
Xu(2013)50)	TE21, SI19, GB2, SJ17	G6805-II device	Continuous wave	NR	patient's tolerance	30m	once daily	15s
Qiu(2012)52)	TE21, SI19, GB2 / TE17, GB8, GB20	SDZ-II electronic acupuncture apparatus	Dispersing-dense wave	NR	patient's tolerance	20m	once daily	20s/2c
								1c=daily session for 5d followed by 2d break
Chen(2011)53)	NR	NR	Continuous wave	10 ㎐	patient's tolerance	30m	once daily	10s
Wu(2010)54)	GB20, Blood Supply Point(供血)	KWD-808II	Dispersing-dense wave	NR	patient's tolerance	30m	once daily	NR
								1c=daily session for 5d followed by 2d break
Luo(2009)55)	GB2, TE17, LI4, GB43, TE3	G6805	Continuous wave	NR	patient's tolerance	30m	once daily	10s

NR: Not Reported; c: Cycle; s: Session; d: Day; m: Minutes; EA: Electro-acupuncture