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. Author manuscript; available in PMC: 2007 Oct 24.
Published in final edited form as: Am J Obstet Gynecol. 2007 Jun;196(6):574.e1–574.e6. doi: 10.1016/j.ajog.2007.03.023

Table II.

Clinical characteristics of the study population according to term or preterm delivery

Term delivery
(n=298)		 Preterm delivery
(n=474)		 p
Gestational age at enrollment (weeks) 31.8
(20-36.4)		 30.2
(20.6-36.7)		 <0.001
Gestational age at delivery (weeks) 38.6
(37-41.8)		 33.1
(23-36.8)		 <0.001
Birthweight (grams) 2,992
(1,890-4,337)		 1,900
(426-3,520)		 <0.001
Nulliparity (%) 28.2
(84/298)		 33.8
(160/474)		 NS
Proportion of SGA neonates 21.5
(64/298)		 12.7
(60/474)		 0.001

The results are expressed as percentage (proportions) and median (range). SGA: small for gestational age.