Severe Maternal Morbidity and Other Perinatal Complications Among Black, Hispanic, and White Birthing Persons With and Without Physical Disabilities.

People with physical disabilities are at increased risk of adverse perinatal outcomes, including severe maternal morbidity (SMM). Risks may be even greater for disabled people in minoritized racial or ethnic groups, but little is known about this intersection. We analyzed linked hospital discharge and vital records data from California, 2008-2020. We identified physical disabilities using diagnosis codes for maternal congenital anomalies, major injuries, musculoskeletal disorders, or nervous system disorders. We compared birthing persons in five groups (Black and Hispanic with and without physical disabilities, White with physical disabilities) to a reference group of non-Hispanic Whites without disabilities. We used Poisson regression to assess associations with SMM and other outcomes, with and without adjusting for sociodemographic and clinical covariates. Disabled Black and Hispanic birthing persons had particularly high relative risks (RRs) of SMM (Black disabled RR = 6.13, 95% confidence interval [CI]: 4.94, 7.61; Hispanic disabled RR = 3.67, 95% CI: 3.29, 4.10) as compared with nondisabled White persons. These risks were greater than those for nondisabled Black (RR = 2.05, 95% CI: 1.99, 2.11), nondisabled Hispanic (RR = 1.36, 95% CI: 1.34, 1.39), and disabled White birthing persons (RR = 2.44, 95% CI: 2.16, 2.77). For most other outcomes, risks were also largest for disabled Black birthing persons, followed by disabled Hispanic birthing persons. Black and Hispanic people with physical disabilities are highly likely to experience SMM and are at increased risk for other complications and adverse outcomes. Efforts are needed to understand underlying causes of these disparities and develop policies and practices to eliminate them.