. Author manuscript; available in PMC: 2017 Mar 29.

Published in final edited form as: J Matern Fetal Neonatal Med. 2014 Sep 29;28(12):1394–1409. doi: 10.3109/14767058.2014.958463

Table I.

Maternal characteristics and demographic data of the study population

	Median (IQR) or % (n/N)
Maternal age (years)	27 (22 – 32)
Body mass index (kg/m²)	25.1 (21 – 28)
Nulliparity	29 (17/59)
Tobacco use during pregnancy	34 (20/59)
Illicit drugs use	27 (16/59)
Cervical dilatation at admission (cm)	1 (0 – 1.5)
GA at amniocentesis (weeks)	28 (25 – 31)
Route of delivery
Vaginal	56 (33)
Cesarean	44 (26)
Clinical signs of chorioamnionitis	7 (4/59)

IQR: interquartile range; AF: amniotic fluid; GA: gestational age; PCR: polymerase chain reaction; ESI-MS: electrospray ionization mass spectrometry.