. Author manuscript; available in PMC: 2014 Sep 15.

Published in final edited form as: J Perinat Med. 2013 Sep 1;41(5):485–504. doi: 10.1515/jpm-2013-0082

Table 1. Demographics and clinical characteristics of the study populations.

	Microarray					qRT-PCR
	Control Patients (n=61)	Early-onset Preeclampsia (n=25)	p-value	Late-onset Preeclampsia (n=47)	p-value	Control Patients (n=99)	Early-onset Preeclampsia (n=31)	p-value	Late-onset Preeclampsia (n=72)	p-value
Maternal Age (years)	24.1 (16-39)	24.0 (16-37)	0.38	21.7 (16-36)	0.07	24.3 (16-39)	22.7 (16-37)	0.21	21.8 (16-36)	0.01
Nulliparity	19 (31.1)	14 (56.0)	0.03	27 (57.4)	0.006	29 (29.3)	19 (61.3)	0.001	41 (56.9)	<0.001
African American	56 (91.8)	21 (84.0)	0.28	41 (87.2)	0.44	85 (85.9)	25 (80.6)	0.48	66 (91.7)	0.24
Tobacco Use	4 (6.6)	4 (16.0)	0.17	9 (19.1)	0.046	17 (17.2)	5 (16.1)	0.89	10 (13.9)	0.56
BMI (kg/m²)	27.1 (16.6-47.7)	24.6 (13.8-35.9)	0.04	26.4 (17.7-48.3)	0.69	26.2 (16.4-54.9)	24.7 (13.8-36.0)	0.22	27.9 (16.5-52.4)	0.37
Gestational Age at blood Draw (weeks)	33.7 (20.0-40.1)	31.1 (25.0-33.9)	0.004	37.9 (34.3-41.4)	<0.001	34.7 (20.0-40.1)	31.1 (24.7-34.0)	<0.001	38.1 (34.3-42.0)	<0.001
WBC Cells/mm³	8.0 (4.2-13.8)	9.7 (6.7-18.7)	0.002	8.3 (4.8-15.1)	0.19	8.8 (2.7-18.7)	9.7 (3.8-18.7)	0.04	8.5 (4.8-23.6)	0.63
Severe Preeclampsia	----	22 (88.0)	----	28 (59.6)	----	----	26 (83.9)	----	39 (54.2)	----
Gestational Age at Delivery (weeks)	39.1 (37.0-41.7)	31.7 (26.1-34.0)	<0.001	38.0 (35.0-41.4)	<0.001	39.1 (37.0-42.1)	31.7 (24.9-35.4)	<0.001	38.3 (35.0-42.1)	<0.001
Birthweight (grams)	3390 (2575-4010)	1235 (550-1910)	<0.001	2880 (1670-4180)	<0.001	3340 (2575-4010)	1330 (474-2730)	<0.001	2968 (1670-4180)	<0.001
Birthweight <10%ile	0	11 (44.0)	<0.001	15 (31.9)	<0.001	0	14 (45.2)	<0.001	18 (25.0)	<0.001

Data are expressed as median (range).

Data are expressed as count (% of group)

BMI: Body mass index

WBC: White blood cell counts