. Author manuscript; available in PMC: 2015 Apr 1.

Published in final edited form as: Am J Reprod Immunol. 2014 Jan 13;71(4):330–358. doi: 10.1111/aji.12189

Table I. Maternal characteristics and demographic data of the study population.

	Median (IQR) or % (n/N)
Maternal age (years)	23 (20 - 26.3)
Body mass index (kg/m²)	24 (21 - 30)
Cervical dilatation at admission (cm)	3 (2.0 - 3.5)
AF glucose (mg/dL)	25 (19 - 31)
AF white blood cell count (cells/mm³)	2 (0 - 12)
GA at amniocentesis (weeks)	30 (25 - 32)
GA at delivery (weeks)	34 (27 - 37)
Birthweight (grams)	2190 (930 - 2700)
AF culture positive	7 (10/142)
Detection of bacteria and/or virus genome by PCR/ESI-MS	21 (30/142)
Positive PCR-ESI-MS (GE/well ≥ 17)	12 (17/142)

AF: amniotic fluid; GA: gestational age; GE/well: genome equivalent per PCR reaction; IQR: interquartile range; PCR: polymerase chain reaction; ESI-MS: electrospray ionization mass spectrometry.