Table II. Demographic and clinical characteristics of women presenting with spontaneous preterm labor with intact membranes.
| PTL without IAI Term delivery (n=44) | p | PTL without IAI Preterm delivery (n=40) | pa | PTL with IAI Preterm delivery (n=62) | pb | |
|---|---|---|---|---|---|---|
| Maternal age (years) | 23 (20-27) | NS | 21.5 (20-28.8) | NS | 22 (20-26.8) | NS |
| Smoking | 28.6 (6/21) | <0.05 | 3.6 (1/28) | <0.05 | 24.2 (8/33) | NS |
| GA at amniocentesis (weeks) | 30.5 (27.7-33.2) | NS | 31.9 (28.1-33.3) | <0.05 | 28.9 (26.5-32.7) | NS |
| GA at delivery (weeks) | 39.1 (38.1-40) | <0.001 | 34.6 (33.2-35.8) | <0.001 | 30.6 (27.0-32.9) | <0.001 |
| Birthweight (grams) | 3,154 (2,910-3,505) | <0.001 | 2,455 (1,973-2,693) | <0.001 | 1,515 (930-2,112) | <0.001 |
Values expressed as percentage (number) or median (interquartile range)
p: comparison between PTL who delivered at term and PTL without IAI
pa: comparison between PTL who delivered preterm without IAI and PTL with IAI
pb: comparison between PTL who delivered at term and PTL with IAI
PTL: preterm labor; GA: gestational age; IAI: intra-amniotic infection/inflammation; NS: not significant