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Table 3 Incidence rate of preeclampsia (2001–2006) by socioeconomic indicators

From: Comparison of birth certificates and hospital-based birth data on pregnancy complications in Los Angeles and Orange County, California

   Number Incidence rate: Memorial data Incidence rate: birth certificate data Ratio of incidence rate: birth certificate/Memorial data
Maternal Educationa College or higher 35616 3.11 % 1.46 % 0.47
  High School or lower 25389 3.17 % 1.24 % 0.39
  Unknown 1195 2.76 % 2.01 % 0.73
  p-value: College or higher vs. High school or lower   0.65 0.02* 0.01*
Race/ethnicitya Asian 8489 2.67 % 1.06 % 0.40
  Black 5576 4.12 % 1.90 % 0.46
  Hispanic 22995 3.20 % 1.25 % 0.39
  Non-Hispanic White 23400 2.95 % 1.48 % 0.50
  Other 1187 4.13 % 1.52 % 0.37
  Unknown 553 2.35 % 1.81 % 0.77
  p -value: Asian-Black   0.00* 0.00* 0.20
  p -value: Asian-Hispanic   0.01* 0.15 0.48
  p -value: Black-Hispanic   0.00* 0.00* 0.15
  p -value: Hispanic- NH White   0.12 0.03* 0.01*
Insurancea Private 41024 3.02 % 1.46 % 0.48
  Public 18643 3.32 % 1.30 % 0.39
  Other 2527 3.44 % 0.79 % 0.23
  Unknown 6 0.00 % 0.00 % N.A.
  p-value: Private vs. Public   0.05 0.12 0.02*
  1. aThe classification of socioeconomic status was based on variables reported in the birth certificate data
  2. *Statistically significant result at an alpha level of 0.05