Racial and ethnic differences in the prevalence of placenta previa

L. H. Kim, A. B. Caughey, J. C. Laguardia, G. J. Escobar

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Objective: The objective of this study is to determine the prevalence of placenta previa among different racial and ethnic groups. Study Design: We conducted a retrospective cohort study to examine the prevalence of placenta previa among five major racial and ethnic groups: African American, Asian, Caucasian, Hispanic and Native American. We included all deliveries ≥20 weeks gestation from a large northern Californian Health Maintenance Organization from 1995-2006. A multivariable logistic regression model was used to control for potential confounders. Result: Of the 394 083 deliveries in our cohort, 1580 (0.40%) were complicated by placenta previa. The prevalence of placenta previa was: Asian 0.64%, Native American 0.60%, African American 0.44%, Caucasian 0.36%, Hispanic 0.34% and unknown 0.31% (P<0.001). In our multivariable logistic regression model, only Asians (odds ratio (OR) 1.73, 95% confidence intervals (CI) 1.53-1.95) and African Americans (OR 1.43, 95% CI 1.19-1.72) were at increased risk for having placenta previa, compared with Caucasians. Conclusion: Asian women have the highest prevalence of placenta previa.

Original languageEnglish (US)
Pages (from-to)260-264
Number of pages5
JournalJournal of Perinatology
Issue number4
StatePublished - Apr 2012


  • placenta previa
  • race and ethnicity
  • risk factors

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Obstetrics and Gynecology


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