Table 1.

Basic characteristics of the 15 included studies.

Author	Year	Area	Treatment group			Control group			Outcome
			Sample size	Age	Intervention	Sample size	Age	Intervention
Xiao Huizhong	1990	Fujian Province	36	–	Electroacupuncture + TDP	36	–	Electroacupuncture	①②
Che Juan	1993	Heilongjiang Province	180	20 ~ 40	Electroacupuncture + TDP	40	20 ~ 40	Acupuncture	①②
Zhu Qiufen	1994	Gansu Province	90	10 ~ 59	Electroacupuncture + TDP	80	10 ~ 59	TDP	①②
Wu Hongbo	1998	Fujian Province	132	21 ~ 68	Electroacupuncture + TDP	68	21 ~ 68	Electroacupuncture	①②
Qiu Xiaolong	2006	Zhejiang Province	38	15 ~ 80	Electroacupuncture + TDP	43	15 ~ 80	Acupuncture + TDP	①②
Zhang Guangli	2008	Hunan Province	50	13 ~ 72	Electroacupuncture point-through-point + TDP	50	15 ~ 69	Electroacupuncture point-through-point	①②
Tian Qiang	2009	Guizhou Province	18	1 ~ 50	Electroacupuncture + TDP	22	7 ~ 60	Electroacupuncture	①②
Xin Yuwen	2010	Guangdong Province	65	3 ~ 75	Electroacupuncture + TDP	30	5 ~ 76	Western medicine	①②
Chang Xueli	2011	Henan Province	50	27.26 ± 15.78	Electroacupuncture + TDP	22	26.87 ± 16.25	Acupuncture	①②
Cao Fadong	2012	Henan Province	85	19 ~ 68	Electroacupuncture + TDP	85	20 ~ 69	Electroacupuncture	①②
Hu Jiaqian	2013	Zhejiang Province	48	3 ~ 70	Electroacupuncture + TDP	44	14 ~ 73	Electroacupuncture	①②
Wu Lei	2013	Chongqing	88	3 ~ 7	Electroacupuncture + TDP	88	3 ~ 7	Acupuncture + TDP	①②
Zou Yan	2014	Zhejiang Province	30	15 ~ 55	Electroacupuncture + TDP	30	18 ~ 59	Electroacupuncture + acupuncture	①②
Li Shujuan	2015	Hebei Province	76	16 ~ 72	Electroacupuncture + TDP	76	14 ~ 69	Electroacupuncture	①②
Ge Xiaohang	2016	Henan Province	22	22 ~ 78	Electroacupuncture point-through-point + TDP	22	18 ~ 71	Electroacupuncture point-through-point	①②

TDP, Teding Dianci Pu; ①: Efficacy rate, ②: Cure rate.