Verification of the Efficacy and Safety of Qi-Replenishing Chinese Medicine in Treating Prediabetes: A Meta-Analysis and Literature Review

Figure 2

Potential bias risk involved in this study. (a) Risk of bias in the included studies 1 = random sequence generation (selection bias), 2 = allocation concealment (selection bias), 3 = blinding of participants and personnel (performance bias), 4 = blinding of outcome assessment (detection bias), 5 = incomplete outcome data (attrition bias), 6 = selective reporting (reporting bias), 7 = other bias. (b) Summary of the bias risk for the included studies.

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