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. Author manuscript; available in PMC: 2009 Nov 10.
Published in final edited form as: Virchows Arch. 2008 Sep 13;453(4):387–400. doi: 10.1007/s00428-008-0658-x

Table 1.

Demographic and clinical characteristics of the study groups
Groups Preterm controls Preterm preeclampsia Preterm HELLP Term controls Term preeclampsia
Number of cases1 10 13 12 20 7
Maternal age (years)2 26.5 (5.5) 30.9 (5.6) 28.4 (4.5) 32.2 (4.9) 28.3 (3.0)
Gestational age at delivery (weeks)2 32.5 (2.8) 30.9 (2.1) 31.42 (2.8) 38.7 (0.8) 37.6 (0.8)
Primiparity3 50 38.5 58.3 15 85.7
Smoking3 30 15.4 0 5 0
Systolic blood pressure (mmHg)2,4 115.6 (7.2) 162.3 (16.0)* 162.9 (10.5)* 120.3 (11.9) 163.1 (15.8)*
Diastolic blood pressure (mmHg)2,4 75.0 (8.7) 95.5 (11.7)* 105.0 (13.8)* 74.8 (5.8) 103.0 (11.2)*
Maternal BMI (kg/m2)2 25.6 (4.3) 32.4 (8.4) 26.6 (3.4) 26.2 (4.0) 28.3 (1.1)
Neonatal birth-weight (g)2 2246 (709.1) 1391.5 (446.9) 1445.8 (421.8) 3317 (470) 2714 (498)
Placental weight (g)2 410.5 (65.8) 261.5 (63.1) 262.6 (51.7) 504.0 (81.9) 379.8 (110.9)
Caesarean section3 50 100 100 100 100

All women were Caucasian.

1

Values are presented as number

2

mean(±SD)

3

or percentage.

*

p<0.001

p<0.01

p<0.05 compared to gestational age matched controls.

4

Highest blood pressure values measured before delivery.