Effects of Warm Needle Acupuncture on Temporomandibular Joint Disorders: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Table 2

Characteristics information of the included studies.

Author	Year	Group	Interventions	Sample size	Age (years)	Gender (M/F)
Liao	2001	T	WNA	32	15–52	21/38
		C	Acupuncture	27
Jin	2005	T	WNA	36	19–61	10/26
		C	Drug therapy	32	21–59	8/24
He	2007	T	WNA	31	20.48 ± 5.30	NA
		C	Acupuncture + TDP	31	18.24 ± 5.21
Zhong	2007	T	WNA	60	35 ± 5	30/30
		C	Ultrasonic therapy	60	34 ± 4	30/30
Zhang	2008	T	WNA	23	18–55	13/10
		C	Drug therapy	22	18–55	10/12
Zhao	2015	T	WNA	36	18–45	15/21
		C	Acupuncture	36	19–50	18/18
Liu 1	2019	T	WNA	33	48 ± 0	14/19
		C	Drug therapy	32	49 ± 1	15/17
Liu 2	2019	T	WNA	33	48.42 ± 0.28	14/19
		C	Drug therapy	32	48.91 ± 0.67	15/17
Wang 1	2021	T	WNA	28	44.14 ± 14.16	4/24
		C	Electroacupuncture	29	39.24 ± 12.97	5/24
Wang 2	2021	T	WNA	28	44.14 ± 14.16	4/24
		C	Drug therapy	29	43.91 ± 16.34	6/23

Note. T = test group, C = control group, I = intervention, M = male, F = female.