Table 1.
Clinical and demographic characteristics of the study population
| Patients with preterm labor who delivered at term (n = 32) |
Patients with preterm labor who delivered preterm | P-value | |||
|---|---|---|---|---|---|
| Without intra-amniotic inflammation or infection (n = 41) |
With sterile intra- amniotic inflammation (n = 32) |
With intra-amniotic infection (n = 19) |
|||
| Maternal age (years; median [IQR])a | 23 (20.8-25) | 23 (20-26) | 24 (20-28) | 23 (20-26) | 0.6 |
| Body mass index (kg/m2; median [IQR])a | 21.6 (19.8-29.5)c | 24.2 (20.8-28.8)c | 27.5 (23-33.3)c | 24.4 (21.5-32.8)c | 0.1 |
| Primiparityb | 18.8% (6/32) | 29.3% (12/41) | 31.3% (10/32) | 21.1% (4/19) | 0.6 |
| Raceb | 0.8 | ||||
| African-American | 96.9% (31/32) | 85.4% (35/41) | 87.5% (28/32) | 94.7% (18/19) | |
| Caucasian | 0% (0/32) | 7.3% (3/41) | 6.3% (2/32) | 5.3% (1/19) | |
| Hispanic | 0% (0/32) | 4.9% (2/41) | 3.1% (1/32) | 0% (0/19) | |
| Other | 3.1% (1/32) | 2.4% (1/41) | 3.1% (1/32) | 0% (0/19) | |
| Gestational age at amniocentesis (weeks; median [IQR])a | 31.4 (30.4-32.9) | 31.4 (27-32.7) | 25.2 (23.3-29.9) | 28 (23.1-31.5) | <0.001 |
| Gestational age at delivery (weeks; median [IQR])a | 38.7 (37.4-39.4) | 34.3 (32.1-36) | 26.1 (24.3-31.1) | 28.1 (23.1-32.4) | <0.001 |
| Birthweight (g)a | 3072.5 (2900-3388.8) | 2260 (1612.5-2491.3)c | 849 (565-1530) | 1120 (560.5-1980) | <0.001 |
| Apgar score at 1 mina | 9 (8-9) | 8 (7-9)c | 5.5 (2-8) | 4 (1.5-7.5) | <0.001 |
| Apgar score at 5 mina | 9 (9-9) | 9 (8-9)c | 7 (5.8-9) | 7 (2.5-8) | <0.001 |
| Acute histologic chorioamnionitisb | 28.1% (9/32)c | 29.3% (12/41)c | 59.4% (19/32) | 89.5% (17/19) | <0.001 |
| Acute funisitisb | 15.6% (5/32)c | 14.6% (6/41)c | 28.1% (9/32) | 68.4% (13/19) | <0.001 |
Data are given as median (interquartile range) and percentage (n/N)
a
Kruskal-Wallis test
b
Fisher’s exact test
c
Few missing data