The Therapeutic Effect of Berberine in the Treatment of Nonalcoholic Fatty Liver Disease: A Meta-Analysis

Table 2

Risk of bias assessment.

Type of bias	Bai et al. 2011 [16]	Cao et al. 2012 [17]	Li 2015 [18]	Ning et al. 2013 [19]	Xie et al. 2011 [20]	Yan et al. 2015 [21]
Random sequence generation (selection bias)	?	?	Low	?	?	Low
Allocation concealment (selection bias)	?	?	High	?	?	?
Blinding of participants and personnel (performance bias)	?	?	?	?	?	?
Blinding of outcome assessment (detection bias)	?	Low	Low	Low	Low	Low
Incomplete outcome data (attrition bias)	Low	?	Low	Low	Low	High
Selective reporting (reporting bias)	Low	Low	Low	?	Low	Low
Other biases	Low	Low	Low	Low	Low	Low