Fig. 2From: The beneficial effect of alpha-blockers for ureteral stent-related discomfort: systematic review and network meta-analysis for alfuzosin versus tamsulosin versus placeboRisk of bias graph. We reviewed the risk of bias in each study included in this meta-analysis and presented the results as percentages. Four trials exhibited a low risk of bias for all quality criteria, and two studies were classified as having a high risk of biasBack to article page