Review Article
Shuangdan Mingmu Capsule for Diabetic Retinopathy: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Table 2
The methodologic quality of the included trials assessed using the cochrane risk of bias tool.
| References | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
| Tu et al. 2009 [19] | ? | ? | + | + | + | + | + | Pang 2015 [18] | ? | ? | ? | ? | + | + | + | Jin and Zhang 2019 [17] | ? | ? | ? | ? | + | + | + | Fu 2019 [15] | ? | ? | ? | ? | + | + | + | Liu et al. 2019 [16] | + | ? | ? | ? | + | + | + | Zhang et al. 2021 [14] | + | ? | ? | ? | + | + | + | Ji and Liu 2022 [20] | + | ? | ? | ? | + | + | + |
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Notes: + = low risk of bias; ? = unclear risk of bias; − = high risk of bias.
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