Cardio-oncology & otherResearch article
Association Between Changes in Maternal Age Distribution and Hypertensive Disorders of Pregnancy in the United States, 2011–2021
- Data from 2011 to 2021 were abstracted from the National Center for Health Statistics
- Kitagawa decomposition
- rate ratios
Authors' conclusion
Although both maternal age and frequency of HDP increased significantly between 2011 and 2021, the higher rates of HDP were not due to the upward shift in the age distribution, but rather, to increases in HDP frequency within all age groups.
Study context
- Population
- Births to individuals aged 15 to 44 years, all live births in the United Stateslive births in 2011 and 2021
- Participants
- 7,595,018 births
- Comparison
- changes in hypertensive disorders of pregnancy (HDP) per 1000 live births between 2021 and 2011
Main finding
As reported in the abstract
Mean maternal age
Further findings
Frequency of HDP · increased significantly
Kitagawa decomposition of change in HDP
- change in maternal age distribution (no association)
- 0.0 [−0.1 to 0.1]
- age-specific rate of HDP (responsible for the total change)
- 47.1 [46.7-47.4]
- age-specific rate of HDP increased across all age groups
Original publication
Association Between Changes in Maternal Age Distribution and Hypertensive Disorders of Pregnancy in the United States, 2011–2021. Circ Popul Health Outcomes. Published 16 February 2026. doi:10.1161/circoutcomes.125.012757
Summarised from the published abstract; every number is checked against it