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Use of a Risk Assessment Tool to Predict Postpartum Hemorrhage in a Community Birth Population
Summary
The AWHONN Postpartum Hemorrhage (PPH) Risk Assessment Tool showed poor predictive power for PPH in community births. Modifying the tool with additional risk factors like nulliparity slightly improved its accuracy.
Area of Science:
- Obstetrics and Gynecology
- Maternal Health
- Epidemiology
Background:
- Postpartum hemorrhage (PPH) is a leading cause of maternal mortality worldwide.
- Accurate risk assessment tools are crucial for timely intervention and improved outcomes.
- Community birth settings present unique challenges and populations for PPH risk assessment.
Purpose of the Study:
- To determine postpartum hemorrhage (PPH) outcomes in a community birth population.
- To evaluate the predictive accuracy of the Association of Women's Health, Obstetric and Neonatal Nurses (AWHONN) Postpartum Hemorrhage Risk Assessment Tool in this population.
- To explore modifications to enhance the tool's predictive capabilities.
Main Methods:
- Secondary data analysis of 61,246 community births from the MANA Statistics Project 4.0 database (2011-2018).
- Calculation of PPH rates and assessment of the AWHONN tool's predictive power using logistic regression and Area Under the Curve (AUC).
- Evaluation of AUC with the original tool, a modified tool including nulliparity, and a cumulative risk factor approach.
Main Results:
- The incidence of PPH in the study sample was 6.4% (n = 3,899).
- The AWHONN tool demonstrated poor predictive ability with an AUC of 0.53.
- Incorporating nulliparity as a risk factor improved the tool's AUC to 0.59.
Conclusions:
- The AWHONN PPH Risk Assessment Tool is not sufficiently predictive for PPH in community birth settings.
- Enhancing risk assessment tools by including additional factors, such as nulliparity, may improve their accuracy.
- Further research is needed to develop and validate robust PPH risk prediction models for diverse birth populations.
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