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Background <p>In the US, there is substantial variability in low-risk cesarean birth rate by hospitals and race/ethnicity. The contribution of inequitable hospital quality to disparities in low-risk cesarean births is uncertain. We examine the contribution of birth hospital to racial/ethnic disparities in low-risk cesarean births.</p> Methods <p>We used vital records linked with maternal birth hospitalization data (California, 2007–18). We examined self-reported race/ethnicity and low-risk cesarean birth, i.e., nulliparous, term, singleton, and vertex (NTSV) births. Poisson regression models with a mixed effect for hospital and bootstrapped errors were used to compare racial/ethnic differences in cesarean prevalence, adjusted for maternal and hospital characteristics. We used G-computation to assess how the prevalence of cesarean section by racial/ethnic group would change if all births occurred at the same distribution of hospitals as births to White individuals.</p> Results <p>Among 1,594,277 NTSV births at 212 hospitals, 26.9% were cesarean. After adjustment for hospital characteristics, risk ratios for cesarean birth ranged from 1.05 for foreign-born Hispanic (95% <i>CI</i> 1.02–1.09) to 1.28 for Black (95% <i>CI</i> 1.22–1.33) individuals, relative to White individuals. In the G-computation substitution, cesarean prevalence among NTSV births was reduced for some race/ethnicities and increased for others, ranging from 87 excess events (0.3% increase) in Black populations to 6473 avoided events (5.6% decrease) among US-born Hispanic populations.</p> Conclusions <p>Racial/ethnic disparities in cesarean prevalence among low-risk births in California are not explained by individual-level maternal or hospital characteristics.</p>

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Can Birth Hospital Explain Racial/Ethnic Differences in Cesarean Birth Among Low-Risk Births? An Analysis of California Data, 2007–2018

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Shalmali Bane,
  • Mahasin S. Mujahid,
  • Peiyi Kan,
  • Elliot K. Main,
  • Suzan L. Carmichael

摘要

Background

In the US, there is substantial variability in low-risk cesarean birth rate by hospitals and race/ethnicity. The contribution of inequitable hospital quality to disparities in low-risk cesarean births is uncertain. We examine the contribution of birth hospital to racial/ethnic disparities in low-risk cesarean births.

Methods

We used vital records linked with maternal birth hospitalization data (California, 2007–18). We examined self-reported race/ethnicity and low-risk cesarean birth, i.e., nulliparous, term, singleton, and vertex (NTSV) births. Poisson regression models with a mixed effect for hospital and bootstrapped errors were used to compare racial/ethnic differences in cesarean prevalence, adjusted for maternal and hospital characteristics. We used G-computation to assess how the prevalence of cesarean section by racial/ethnic group would change if all births occurred at the same distribution of hospitals as births to White individuals.

Results

Among 1,594,277 NTSV births at 212 hospitals, 26.9% were cesarean. After adjustment for hospital characteristics, risk ratios for cesarean birth ranged from 1.05 for foreign-born Hispanic (95% CI 1.02–1.09) to 1.28 for Black (95% CI 1.22–1.33) individuals, relative to White individuals. In the G-computation substitution, cesarean prevalence among NTSV births was reduced for some race/ethnicities and increased for others, ranging from 87 excess events (0.3% increase) in Black populations to 6473 avoided events (5.6% decrease) among US-born Hispanic populations.

Conclusions

Racial/ethnic disparities in cesarean prevalence among low-risk births in California are not explained by individual-level maternal or hospital characteristics.