. Author manuscript; available in PMC: 2013 Jan 31.

Published in final edited form as: J Matern Fetal Neonatal Med. 2010 Feb;23(2):120–130. doi: 10.3109/14767050903026481

Table I.

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

	Mid-trimester (n=52)	p^a	Term No labor (n=41)	Term In labor (n=49)	p^b
Maternal age (years)	36 (35 – 38)	<0.001	27 (21 – 32)	22 (19 – 26)	0.007
GA at amniocentesis (weeks)	16 (16 – 17)	<0.001	38 (38 – 39)	38 (37.7 – 39.3)	NS
GA at delivery (weeks)	39 (38 – 40)	NS	38 (38 – 39)	38.5 (38 – 39)	NS
Birth weight (grams)	3344 (3144–3589)	NS	3260 (3070–3668)	3360 (3085–3550)	NS

Values are expressed as median (interquartile range).

NS: not significant.

p^a: comparison between patients in the mid-trimester and those at term not in labor

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