Racial and ethnic differences in the prevalence of placenta previa

Abstract

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 X20 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.

Peripartum hysterectomy between 2009 and 2010 in Sichuan, China

“…The high overall rate of CD observed in the present study probably reflects to the high rate of CDMR (21.1%), which is similar to the rate of 22% reported in a population‐based study conducted in the Chinese provinces of Hebei, Zhejiang, and Jiangsu [14]. Surprisingly, a much higher incidence of PP (4.2%) was detected in the present study than the 0.4%–1.4% incidence reported by studies in Greece, Israel, Denmark, and the USA [15–19]. Whether this high rate of CD is the main cause of the high rate of PP observed in the present study remains unclear.…”

Importance of Pre-pregnancy Counseling in Iran: Results from the High Risk Pregnancy Survey 2012

“…The obtained prevalence of third-and fourth-degree perineal lacerations was lower than that reported in some countries, the main reason could be higher cesarean rate in this study (23). Prevalence of the two complications of placenta previa and placenta abruption in the studied subjects was considerably higher than that reported in other countries (10,24). The two mentioned complications are influenced by different factors including race, age, and parity, nonetheless, all these factors combined do not entirely account for such a difference in the prevalence rate.…”

Maternal and neonatal outcomes of placenta previa and accreta at Assiut women’s health hospital, Egypt

“…9 In the present study the incidence of PP was 1.7% that is higher than which reported 0.4%. 2 Also the incidence of PA was 0.4% also higher than which reported 1/533 deliveries. 5 This alarming increase appears to be directly related to the rising rates of CS plus this risk increase with increase number of CS.…”

“…1 Placenta previa complicates approximately 0.4 % pregnant women and has a mortality rate of 0.0 3%. 2,3 Placenta previa may be associated with placenta accreta (PA) or one of its more advanced forms as (placenta increta and percreta). Clinically, PA becomes problematic during delivery when the placenta does not completely separate from the uterus and is followed by massive obstetric hemorrhage, leading to disseminated intravascular coagulopathy; the need for hysterectomy; surgical injury to the ureters, bladder, bowel, or neurovascular structures; adult respiratory distress syndrome; acute transfusion reaction; electrolyte imbalance; and renal failure.…”