Fig. 1

Receiver operating characteristic curve showing discrimination of the clinical prediction model for maternal end-organ injury or death. Legend: Outcomes are those arising between 20 weeks’ gestation and 42 days after birth, using variables measured pre-pregnancy, and in the index pregnancy prior to 20 weeks’ gestation. Predictor variables and adjusted odds ratios are shown in Table S3. Analysed is the entire cohort of 634,290 births. C-statistic for Area Under the Curve = 0.68 (95% CI 0.66–0.69)