Table 2.

Characteristics of study populations

	Preterm labor (n=20)
Age (years)	22 (20-25)
Parity	40% (8/20)
Body mass index (kg/m2)	23.3 (21.1-32.3)
Gestational age at amniocentesis (weeks)	30.5 (28.3-31)
Gestational age at delivery (weeks)	26.3 (31.5-39.2)
Birthweight (grams)	2617(1,718-3,002)
Amniotic fluid glucose (mg/dl)	25 (17-30)
Amniotic fluid white blood cell (cell/mm)	0 (0-5)
Amniotic fluid IL-6 ELISA (ng/ml)	1.2 (0.5-6.9)
Amniotic fluid IL-6 point of care test (ng/ml)	0.4 (0.2-1.6)
Amniotic fluid IP-10 ELISA (ng/ml)	1.8 (0.9-3.8)
Amniotic fluid IP-10 point of care test (ng/ml)	1.8 (1.3-3.2)
Placental lesions associated with amniotic fluid infection^	42% (8/19)

Data presented as % (N) or median (interquartile range), IL: interleukin, IP: interferon-γ –inducible protein 10 or CXCL 10, MIAC: microbial invasion of the amniotic cavity microbial; ELISA: enzyme-linked immunosorbent assay

^{^}placental lesions associated with amniotic fluid infection include acute chorioamnionitis and funisitis.