Table 1. Basic characteristics of PE cases and normotensive controls.

Characteristics	Normal Pregnancy	PE
Number of subjects	10	10
Maternal age (y)	29.3±4.5	28.5±6.0
Gestational age (wk)	37.7±2.1	33.8±5.5*
Body Mass Index	27.7±3.0	29.0±3.7
Birth weight (kg)	3.3±0.5	2.7±1.0**
S/D ratio	2.1±0.3	3.4±1.0***
Systolic BP (mm Hg)	118.3±10.9	163.6±15.5***
Diastolic BP (mm Hg)	76.1±9.3	103.9±16.1***
Proteinuria (g/24h)	0.15±0.05	3.78±1.51***

Basic characteristics of preeclampsia cases and normotensive controls. The data are expressed as mean ± SD. PE: Preeclampsia.

*, P<0.05;

**, P<0.01;

***, P<0.001, PE vs. normal pregnancy. S/D ratio: Ratio of systolic and diastolic blood flow in the umbilical artery.