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Published on: January 27, 2010
Prediction of Postpartum Haemorrhage After Labour Induction: An Internally Validated 10-Hour Risk-Stratification
Sait Erbey1, Ömer Osman Eroğlu1, Mehmet Alican Sapmaz1
1Department of Obstetrics and Gynecology, Ankara Etlik City Hospital, 06170 Ankara, Turkey.
Diagnostics (Basel, Switzerland)
|June 26, 2026
Summary
A labor induction duration exceeding 10.1 hours is linked to increased postpartum hemorrhage (PPH) risk. This finding helps stratify risk for PPH, a major cause of maternal morbidity.
Area of Science:
- Obstetrics and Gynecology
- Maternal Health
- Clinical Risk Stratification
Background:
- Postpartum hemorrhage (PPH) is a significant cause of maternal morbidity.
- Current risk stratification for PPH lacks practical intrapartum tools.
- The association between labor induction duration and PPH risk needs clinical translation.
Purpose of the Study:
- To derive a clinically interpretable induction duration threshold for PPH risk stratification.
- To develop and internally validate a parsimonious clinical decision-support model for PPH risk.
Main Methods:
- Retrospective cohort study of 1128 induced singleton labors (≥37 weeks).
- PPH defined as hemoglobin drop ≥ 2 g/dL.
- Multivariable logistic regression and ROC analysis for predictor identification and threshold derivation.
Main Results:
- PPH occurred in 12.7% of patients.
- Induction duration (per hour OR 1.243), parity, emergency cesarean, and maternal age were independent PPH predictors.
- A 10.1-hour induction duration threshold showed 86.7% sensitivity and 96.8% negative predictive value.
Conclusions:
- Induction duration is independently associated with PPH risk.
- The validated 10.1-hour threshold serves as a hypothesis-generating benchmark for PPH risk stratification.
- Prospective external validation is required before clinical application; causality requires further study.
