TABLE 4.
Respiratory outcomes
| Period 1 (n=675) | Period 2 (n=851) | Crude OR (95% CI) | Adjusted* OR (95% CI) | |
|---|---|---|---|---|
| Pneumothorax, n (%) | 30 (4) | 42 (5) | 1.1 (0.7–1.8) | 1.4 (0.8–2.3) |
| Supplemental oxygen at 28 days of age, n (%) | 226 (33) | 222 (26) | 0.7 (0.6–0.9) | 0.7 (0.5–0.9) |
| Supplemental oxygen at 28 days of age or died, n (%) | 290 (43) | 296 (35) | 0.7 (0.6–0.9) | 0.7 (0.5–1.0) |
| Supplemental oxygen at 36 weeks’ PCA, n (%) | 80 (12) | 111 (13) | 1.1 (0.8–1.5) | 1.2 (0.9–1.7) |
| Supplemental oxygen at 36 weeks’ PCA or died, n (%) | 144 (21) | 187 (22) | 1.0 (0.8–1.3) | 1.3 (0.9–1.8) |
*Adjusted for gestational age, birth weight, sex, presentation, delivery mode, small for gestational age, Apgar score at 1 min and 5 min, pregnancy-induced hypertension and surfactant. PCA Postconceptional age