Table 2.

Demographic and clinical characteristics of the study population (Second study).

	Term Delivery (n=40)	PTL without IAI (n=33)	PTL with IAI (n=40)
Maternal age (years)	21 (15 – 41)	22 (14 – 40)	22 (16 – 41)
Nulliparity	50 (20/40)	52 (17/33)	50 (20/40)
Gestational age at amniocentesis (weeks)	31 (24 – 33)	30 (23 – 33)	29 (23 – 33)
Cervical dilatation (cm)	0 (0 – 4)	0 (0 – 5)	1 (0 – 7)
Amniocentesis to delivery interval (days)	55 (33 – 109)	5 (0 – 7)	1 (0 – 7)
Gestational age at delivery (weeks)	39 (37 – 41)	31 (23 – 34)	29 (23 – 34)
Sample storage time (months)	71 (17 – 83)	32 (1 – 144)	57 (4 – 114)

Values are presented as median (range) of percentage (number)

PTL: preterm labor; IAI: intra-amniotic infection/inflammation