Review Article
Ligustrazine for the Treatment of Unstable Angina: A Meta-Analysis of 16 Randomized Controlled Trials
Table 2
Methodological quality of the included studies.
| Studies | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
| Guo 2007 [25] | Low risk | Unclear | Low risk | Low risk | Low risk | Low risk | Low risk | Liao and Luo 2006 [26] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Da 2008 [27] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Rong et al. 2001 [28] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Peng 2014 [29] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Wang and Hua 2004 [30] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Wei et al. 2012 [31] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Wang 2006 [32] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Zhou 2008 [33] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Li 2010 [34] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Sun 2007 [35] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Wang 2008 [36] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Fan 2014 [37] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Fu and Lin 2009 [38] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Meng et al. 2005 [39] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk | Wang et al. 2005 [40] | Low risk | Unclear | Unclear | Unclear | Low risk | Low risk | Low risk |
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