Fig. 3
From: What works in radiology education for medical students: a systematic review and meta-analysis
Risk of bias assessment summary for randomised control trials (A) and non-randomised trials (B)In the randomised trials, there was a serious risk of bias in 12 of 30 randomised studies and moderate risk in 3 of 30 studies. This was predominantly due to missing outcome data and issues from randomisation. In non-randomised trials, 8 of 10 studies were considered at serious risk and 1 study was considered at moderate risk of bias. This was predominantly due to confounding variables followed by missing data and bias in participant selection.