A Meta-Analysis for Comparing the Effects of Febuxostat and Allopurinol on Kidney Function in Hyperuricemia Patients Complicated with Chronic Kidney Disease

Figure 2

Risk of bias graph for the included literature. (a) Risk of bias graph; seven areas were scored for risk of bias; (b) Risk of bias summary; each item of bias was scored as low (+), uncertain (?), or high risk (−).

(a)

(b)