. Author manuscript; available in PMC: 2019 Feb 1.

Published in final edited form as: J Matern Fetal Neonatal Med. 2017 Mar 1;31(4):418–432. doi: 10.1080/14767058.2017.1286319

Table 1.

Demographic and clinical characteristics of the study groups

	Normal pregnancy (n=160)	Preeclampsia (n=40)	p
Maternal age (years)	24 (20–30)	20.5 (19–25)	0.02
Pre-pregnancy body mass index (BMI) (kg/m²)	23.9 (21.6–26.8)	25.7 (23.5–29.2)	0.005
Smoking	23 (14.4)	2 (5)	0.55
Nulliparity	71 (44.4)	26 (65)	0.02
Previous preeclampsia	2 (1.3)	5 (12.5)	0.04
Gestational age at enrollment (weeks)	9.4 (8–11.4)	10 (8.7–11.4)	0.3
Gestational age at delivery (weeks)	40 (39.2–40.7)	38 (34.8–39.3)	<0.001
Birthweight (g)	3415 (3190–3560)	2980 (1990–3537)	<0.001

Data expressed as median (interquartile range) and number (percentage)