The Usefulness of Xuefu Zhuyu Tang for Patients with Angina Pectoris: A Meta-Analysis and Systematic Review

Table 4

The effect of XFZYT for SAP group, outcome = ECG.

Study ID	Treatment duration	Response rate, %; (response/)		Therapeutic gain, %	NNT	RR
		Experimental	Control
Li, 2008 [21]	4 weeks	NA	NA	—	—	—
Wang, 2011 [28]	8 weeks	95.0 (19/20)	65.0 (13/20)	30.0	3.3	1.46
Zhao, 2009 [26]	4 weeks	70.0 (21/30)	40.0 (12/30)	30.0	3.3	1.75
Yang, 2010 [18]	4 weeks	74.0 (37/50)	40.0 (20/50)	34.0	2.9	1.85
Pooled RR	—	77.0 (77/100)	45.0 (45/100)	32.0	3.1	1.71

NNT: number needed to treat; NA: not available; RR: risk ratio.