Fig. 2From: Effects of electroencephalography and regional cerebral oxygen saturation monitoring on perioperative neurocognitive disorders: a systematic review and meta-analysisThe risk of bias assessment of included studies. (a, risk of bias summary: review authors’ judgements of each risk of bias item for each included study; b, risk of bias graph: review authors’ judgements about each risk of bias item presented as percentages across all included studies)Back to article page