Review Article
Compound Danshen Dripping Pill for Treating Nonproliferative Diabetic Retinopathy: A Meta-Analysis of 13 Randomized Controlled Trials
Table 2
Quality assessment of enrolled RCTs.
| Studies | Adequate sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data addressed | Free of selective reporting | Free of other biases | Risk of bias |
| Qi et al. 2007 [11] | Unclear | Unclear | No | Unclear | Yes | No | Unclear | High | He and Zheng 2013 [12] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Xu 2011 [13] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Zhon et al. 2008 [14] | Unclear | Unclear | Unclear | Unclear | No | Yes | Unclear | High | Liu and Hao 2011 [15] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Meng et al. 2011 [16] | Unclear | Unclear | Unclear | Unclear | No | Yes | Unclear | High | Chen and Zhon 2006 [17] | Unclear | Unclear | Unclear | Unclear | No | Yes | Unclear | High | Zhou 2008 [18] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Wang et al. 2016 [19] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Jin et al. 2009 [20] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Shi 2010 [21] | Unclear | Unclear | No | Unclear | Yes | No | Unclear | High | Luo et al. 2015 [22] | Unclear | Unclear | Unclear | Unclear | Yes | No | Unclear | High | Lian et al. 2015 [23] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Low |
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