. Author manuscript; available in PMC: 2011 May 31.

Published in final edited form as: J Matern Fetal Neonatal Med. 2010 Aug;23(8):828–841. doi: 10.3109/14767050903440471

TABLE II.

Demographic and clinical characteristics of patients presenting with spontaneous preterm labor with intact membranes

	PTL without IAI term delivery (n=143)	p	PTL without IAI preterm delivery (n=100)	p^a	PTL with IAI preterm delivery (n=72)	p^b
Maternal age(years)	22 (14–42)	0.9	22 (14–40)	0.7	23 (15–41)	0.8
GA at amniocentesis (wks)	32 (20.3–36)	0.7	31.9 (23.7–34.4)	<0.001	28.2 (20.3–34.4)	<0.001
GA at delivery(wks)	38.7 (37–43)	<0.001	34.6 (26.9–36.9)	<0.001	29.2 (20.4–36)	<0.001
Birthweight (g)	3180 (2390–4750)	<0.001	2335 (800–3560)	<0.001	1190 (280–2740)	<0.001

Values are expressed as median and range

p: comparison between PTL who delivered at term and PTL withour IAI

p^a : comparison between PTL who delivered preterm without IAI and PTL with IAI

p^b : comparison between PTL who delivered at term and PTL with IAI

PTL: preterm labor; GA: gestational age;

IAI: intraamniotic infection/inflammation