Fig. 2From: The accuracy of pulse oximetry in measuring oxygen saturation by levels of skin pigmentation: a systematic review and meta-analysisRisk of bias assessment results. The left section of this figure shows risk of bias judgements for each domain of the QUADAS-2 tool for each study and the right section shows applicability judgements for each concern domain of the QUADAS-2 tool for each study. Please see Additional file 4: Box S3 for all signalling questions used in the QUADAS-2 assessment and further considerationsBack to article page