Table 1 Population characteristics – Washington State preterm births 2002–2011 n = 56,537
From: Neonatal respiratory morbidity following exposure to chorioamnionitis
Variable | Mother did not have chorioamnionitis % (95% CI) | Mother had chorioamnionitis % (95% CI) | p-value |
|---|---|---|---|
Maternal Race | <0.001 | ||
Non-hispanic white | 56.8 (53.4–57.2) | 54.4 (52.5–56.3) | |
Non-hispanic black | 4.3 (4.2–4.5) | 6.5 (5.6–7.5) | |
Hispanic | 17.5 (17.2–17.8) | 15.8 (14.5–17.3) | |
Other/unknown | 21.4 (21.0–21.7) | 23.2 (21.6–24.8) | |
Infant Sex | |||
Male | 54.2 (53.7–54.6) | 52.7 (50.7–54.7) | |
Female | 45.8 (45.4–46.2) | 47.3 (45.3–49.3) | 0.16 |
Preterm premature rupture of membranes | 19.7 (19.4–20.0) | 45.8 (43.9–47.7) | <0.001 |
Small for gestational age (<10th percentile) | 13.4 (13.1–13.7) | 7.1 (6.2–8.2) | <0.001 |
Antenatal steroids | 1.0 (0.9–1.0) | 19.2 (17.6–20.9) | <0.001 |
Admission to neonatal intensive care unit | 36.9 (36.4–37.3) | 59.8 (57.7–61.8) | <0.001 |
Mechanical ventilation of the neonate | 7.6 (7.3–7.8) | 14.6 (13.3–16.0) | <0.001 |
Respiratory distress syndrome | 11.3 (11.1–11.6) | 25.1 (23.5–26.8) | <0.001 |
Bronchopulmonary dysplasia | 1.5 (1.4–1.6) | 7.7 (6.8–8.8) | <0.001 |
Stillbirth | 3.2 (3.1–3.4) | 4.7 (4.0–5.6) | <0.001 |
Infant Death | 0.4 (0.3–0.4) | 0.3 (0.2–0.7) | 0.80 |
Mean (Standard Deviation) | Mean (Standard Deviation) | ||
Maternal age (years) | 28.0 (6.3) | 27.4 (6.4) | <0.001 |
Gestational age at delivery (weeks) | 34.1 (2.9) | 31.1 (4.5) | <0.001 |
Birth weight (grams) | 2587.2 (1185.3) | 2086.9 (1447.9) | <0.001 |