Table 3.

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

		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*

^aThe classification of socioeconomic status was based on variables reported in the birth certificate data

*Statistically significant result at an alpha level of 0.05