BAD Score Calculator
Bleeding Assessment for Death or Near Miss
Predicts life-threatening postpartum bleeding risk at hospital admission
Based on 43,450 women from 4 RCTs across 22 countries · AUROC 0.80 (95% CI 0.76–0.84)
1Maternal Age
2Baseline Systolic Blood Pressure
Mild hypotension: 80–100 mmHg · Severe hypotension: <80 mmHg
3Pre-birth Anaemia Severity
4Additional Risk Factors
Caesarean birth (+2)
Placenta abnormalities (+1)
Hypertensive disease in pregnancy (+2)
Stillbirth (+3)
Placenta abnormalities include praevia, accreta, abruption, or polyhydramnios.
BAD SCORE
0
V. LOW
LOW
INTER.
HIGH
V. HIGH
<33–67–1011–14≥15
Clinical Guidance
Source: Ageron FX, Ker K, Prowse D, et al. Early assessment of maternal bleeding: development and validation of a prognostic model predicting death and near miss. Lancet Glob Health. 2026;14:e378–85.
Validation: Pooled AUROC 0.82 (95% CI 0.78–0.87) for model; 0.80 (0.76–0.84) for BAD score. Internal–external cross-validation across 9 countries.
Data: Individual patient data from WOMAN, WOMAN-2, TRAAP, and TRAAP2 trials (N = 43,450).
This tool does not collect, store, or transmit any personal data. All processing occurs in your browser.
Validation: Pooled AUROC 0.82 (95% CI 0.78–0.87) for model; 0.80 (0.76–0.84) for BAD score. Internal–external cross-validation across 9 countries.
Data: Individual patient data from WOMAN, WOMAN-2, TRAAP, and TRAAP2 trials (N = 43,450).
This tool does not collect, store, or transmit any personal data. All processing occurs in your browser.