. Author manuscript; available in PMC: 2012 Aug 7.

Published in final edited form as: J Matern Fetal Neonatal Med. 2010 Oct;23(10):1119–1128. doi: 10.3109/14767050903572190

Table I.

Clinical and demographic characteristics of the study population.

	Normal Pregnancy (n=44)	p	SGA (n=22)	p^a	Preeclampsia (n=22)	P^b	Preterm Labor (n=22)	p^c
Maternal age (years)	25 (21 – 33)	0.8	28 (21 – 33)	0.2	23 (20 – 29)	0.3	23 (19 – 27)	0.5
Parity	1 (0 – 2)	0.7	1 (0 – 1)	0.7	1 (0 – 1)	0.8	1 (0 – 1)	0.5
Pre-gestational BMI (kg/m²)	23.4 (21.6 – 26.1)	0.6	23.8 (22.6 – 27)	0.7	23.4 (19.4 – 29.5)	0.6	22.8 (21.1 – 24.1)	0.6
GA at maternal blood sampling (weeks)	33.6 (27.9 – 38.5)	0.007	38.1 (37.2 – 38.9)	0.9	33.6 (32.4 – 37.7)	<0.001	NA	NA
GA at delivery (weeks)	38.6 (38.1 – 38.9)	0.1	38.3 (38.0 – 38.7)	<0.001	34.0 (33.0 – 37.7)	0.003	34.0 (33.0 – 34.7)	0.1
Male Gender	25 (57%)	0.4	10 (45%)	0.6	11 (50%)	0.9	10 (45%)	0.9
Birth weight (grams)	3245 (3102–3500)	<0.001	2430 (1962–2595)	<0.001	2135 (1632–2575)	0.2	2345 (2017–2547)	0.3

Values expressed as median (interquartile range) or n (%)

SGA- Small-for-gestational-age; GA – Gestational Age; BMI – Body Mass Index; NA – Not available

p: comparison between normal pregnancy and the SGA group

p^a: comparison between normal pregnancy and the preeclampsia group

p^b: comparison between preeclampsia and the SGA group

p^c: comparison between preeclampsia and the preterm labor group