New Tool Identifies True Causes of Maternal Morbidity
Understanding the primary severe maternal morbidity causes is essential for improving maternal outcomes. Recently, researchers developed a new hierarchical algorithm to solve this problem. This tool utilizes ICD-10 codes to identify the root cause of every case. Furthermore, the algorithm showed a 94.5% concordance rate during validation tests. Therefore, clinicians can trust this data for large-scale population studies.
Applying the Algorithm to Severe Maternal Morbidity Causes
In particular, the study found that hemorrhage remains the leading driver of morbidity. Specifically, hemorrhage accounts for over 50% of cases in the analyzed datasets. Additionally, severe hypertension and infections significantly contribute to these numbers. However, the causes of maternal mortality look quite different from those of morbidity. Cardiovascular disease is the most common cause of maternal death today. Conversely, the algorithm identified cardiovascular issues in only 2.4% of morbidity cases.
This discrepancy highlights the need for distinct strategies for morbidity and mortality. Because morbidity is more frequent than death, it provides more data for quality improvement. Consequently, hospitals should use this algorithm to review their own delivery outcomes. This approach helps identify specific areas where medical protocols need adjustment. For instance, reducing hemorrhage rates requires different interventions than managing cardiac risk. Moreover, the hierarchical nature of the tool prevents double-counting of conditions. As a result, public health officials gain a clearer picture of maternal health.
Frequently Asked Questions
Q1: What are the most common severe maternal morbidity causes identified?
The study identifies hemorrhage, hypertensive disorders, and infection as the primary conditions driving severe morbidity, together accounting for the vast majority of cases.
Q2: How does the primary cause of morbidity differ from mortality?
While hemorrhage and hypertension dominate morbidity, cardiovascular conditions are the leading cause of maternal death but are relatively uncommon in morbidity datasets.
References
- Main EK et al. Development and Application of an Algorithm to Identify the Primary Underlying Condition for Cases of Severe Maternal Morbidity. Obstet Gynecol. 2026 Apr 16. doi: 10.1097/AOG.0000000000006299. PMID: 41990332.
- Centers for Disease Control and Prevention. Severe Maternal Morbidity in the United States. 2024.
- Maryland Maternal Health Surveillance. Comorbidities and Pregnancy-Related Risk Factors. 2025.