Fig. 2.
Risk of bias assessment. Risk of bias assessments were performed using the Risk of Bias Assessment Tool for Nonrandomized Studies.13 Green (+) indicates low risk of bias, blue (?) indicates unclear risk of bias, and red (X) indicates high risk of bias. For the summary of risk of bias, studies were considered overall low risk of bias (green +) if they were classified as low risk in all six domains. Studies were considered a moderate risk of bias (yellow —) if at least one domain was rated unclear risk (but no domains were rated high risk) and high risk (red X) if at least one domain was rated high risk.
Ende. Atonic Hemorrhage Risk Systematic Review. Obstet Gynecol 2021.