Table 1: Demographics by race and ethnicity

From: Racial and ethnic differences in the prevalence of placenta previa

 African AmericanAsianCaucasianHispanicNative AmericanUnknownTotal cohort
N (%)a30 951 (7.9)68 333 (17.3)171 168 (43.4)46 170 (11.7)1489 (0.4)75 972 (19.3)394 083 (100)
Mean age±s.d.27.6±6.630.7±5.429.7±6.028.1±6.028.7±5.928.5±6.129.4±6.1
Prior cesarean N (%)b4123 (13.3)7120 (10.4)18 456 (10.8)5869 (12.7)177 (11.9)8424 (11.1)44 169 (11.2)
Multiple gestation N (%)b1208 (3.9)1675 (2.5)6055 (3.5)1064 (2.3)49 (3.3)1956 (2.6)12 007 (3.0)
Placenta previa N (%)b136 (0.44)437 (0.64)610 (0.36)155 (0.34)9 (0.60)233 (0.31)1580 (0.40)
  1. aPercents calculated based on total cohort.
  2. bPercents calculated based on the N for each column.