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

Table 2

Methodological quality of the included studies.

Study ID	Risk of bias for randomization	Risk of bias for concealment	Risk of bias for blinding	Risk of bias for incomplete data	Risk of bias for selective outcome reporting	Risk of bias for other problems
Li, 2008 [21]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Wang, 2011 [28]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Zhao, 2009 [26]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Yang, 2010 [18]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Chu et al., 2009 [23]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Zheng and Wang, 2009 [24]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Lv, 2009 [22]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Wang et al., 2000 [20]	Low risk	Uncertain	Low risk	Low risk	Low risk	Low risk
Du et al., 2013 [29]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Wang and Jing, 2007 [19]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Li and Zhang, 2011 [27]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Liu et al., 2007 [25]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Zhang, 2012 [17]	Low risk	Uncertain	Uncertain	Low risk	Low risk	Low risk
Li, 2009 [30]	Low risk	Uncertain	Low risk	Low risk	Low risk	Low risk