. 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 I.

Demographic and clinical characteristics of patients in the midtrimester and those at term with and without spontaneous labor

	Midtrimester (n=48)	p^a	Term no labor (n=45)	Term in labor (n=48)	p^b
Maternal age(years)	36 (24–42)	<0.001	27 (14–40)	22 (16–35)	0.004
GA at amniocentesis (wks)	16 (14–18)	<0.001	38.5 (36.5–42)	38.4 (37–41)	0.7
GA at delivery(wks)	39 (37–41)	0.02	38.5 (36.5–42)	38.4 (37––41)	0.7
Birthweight (g)	3331.5 (2809–4180)	0.5	3250 (2500–4530)	3355 (2180–3930)	0.9

Values are expressed as median and range

GA: gestational age

p^a : comparison between patients in the midtrimester and those at term not in labor

p^b : comparison between patients at term not in labor and those at term in labor