Table 4 Rates respiratory distress syndrome (RDS) at early (<32 weeks) and late (≥39 weeks) gestation per 1000 live births and unadjusted odds ratios and 95 % confidence intervals (CI) expressing the association between neonatal co-morbidity and RDS, United States, 2005–2006
RDS <32 weeks | RDS ≥39 weeks | ||||||
|---|---|---|---|---|---|---|---|
No. | Rate per 1000 | Odds ratio [95 % CI] | No. | Rate per 1000 | Odds ratio [95 % CI] | ||
Apgar at 5 min | <4 | 404 | 111.5 | 1.03 [0.92, 1.14] | 108 | 45 | 33.1 [27.2, 40.2] |
4–6 | 1272 | 142.1 | 1.36 [1.27, 1.45] | 421 | 34.1 | 24.8 [22.4, 27.5] | |
≥7 | 5688 | 108.8 | Reference | 3741 | 1.4 | Reference | |
Small for gestational age | 786 | 113 | 1.00 [0.92, 1.08] | 562 | 2.6 | 1.73 [1.58, 1.89] | |
Neonatal seizures | 30 | 428.6 | 5.90 [3.67, 9.47] | 30 | 22.6 | 14.4 [10.0, 20.7] | |
Ventilation ≥ 30 min | 4416 | 320.9 | 7.64 [7.26, 8.04] | 695 | 93.6 | 75.9 [69.7, 82.6] | |
Ventilation <30 min | 503 | 145.4 | 1.36 [1.23, 1.50] | 351 | 9.5 | 6.36 [5.70, 7.10] | |
Birth asphyxia | 4983 | 255.5 | 6.20 [5.88, 6.53] | 1106 | 23.5 | 19.7 [18.4, 21.2] | |
Meconium aspiration syndrome | 10 | 192.3 | 1.87 [0.94, 3.72] | 228 | 57.6 | 39.8 [34.7, 45.6] | |
All live births | 7450 | 113.2 | - | 4287 | 1.6 | - | |