Evidence-Based Complementary and Alternative Medicine

Review Article

Systematic Review and Meta-Analysis of 16 Randomized Clinical Trials of Radix Astragali and Its Prescriptions for Diabetic Retinopathy

Table 2

Quality assessment of evaluated studies.
Items Gao, 2009 [30] Bai et al., 2010 [29] Wu et al., 2009 [31] Ling and Xu, 2006 [32] Zhou et al., 2007 [33] Cai et al., 2005 [34] Liang et al., 2008 [35]Teng, 2004 [36]Li, 2004 [37] Chen et al., 2009 [38] Lei et al., 2008 [39] Xiong et al., 2009 [40]Zhang, 2010 [41] Zhu et al., 1996 [42] Li et al., 1999 [43]Cui, 2006 [44]
Adequate sequence generationYesUCYesUCUCUCUCYesUCUCUCUCUCUCUCYes
Allocation concealmentNoNoYesNoNoNoNoNoNoNoNoNoNoNoNoNo
Blinding methodSingle blindingNoDouble blindingNoNoNoNoSingle blindingNoNoNoNoNoNoNoNo
Incomplete outcome data addressedNoNoYesNoNoNoNoNoNoUCNoNoNoNoNoNo
Selective outcome reportingUCUCUCUCUCUCUCUCUCUCUCUCUCUCUCUC
Other source of biasUCUCUCUCUCUCUCUCUCUCUCUCUCUCUCUC
UC: unclear.