. Author manuscript; available in PMC: 2013 Mar 12.

Published in final edited form as: J Perinat Med. 2009;37(6):623–635. doi: 10.1515/JPM.2009.128

Table 2.

Clinical and demographic characteristics of the study population according to body mass index

	Normal Pregnancy		p	SGA		p
	Normal Weight (n=118)	Overweight/Obese (n=116)	p	Normal Weight (n=35)	Overweight/Obese (n=43)	p
Maternal age (years)	26.5 (21.0–31.0)	29.0 (24.0–34.0)	<0.01	21.0 (18.2–29.7)	24.0 (20.0–32.0)	NS
Parity	1 (0–2)	1 (1–2)	NS	2 (1–3)	2 (1–3)	NS
First trimester BMI (kg/m²)	22.7 (21.4–23.8)	27.3 (25.9–30.3)	<0.01	22.1 (20.2–23.5)	30.6 (28.6–32.2)	<0.01
Gestational age at blood sampling (weeks)	33.7 (31.2–40.0)	31.5 (27.3–33.8)	NS	33.8 (28.0–37.5)	35.0 (27.0–38.6)	NS
Gestational age at delivery (weeks)	40.0 (39.1–40.2)	39.8 (38.8–40.5)	NS	36.0 (32.7–39.0)	38.6 (37.3–40.0)	NS
Birth weight (grams)	3420 (3205–3690)	3505 (3245–3735)	NS	2422 (1813–2643)	2455 (2245–2650)	NS

Values are expressed as median (interquartile range); SGA: Small for Gestational Age; NS: Not significant; BMI: Body Mass Index