| RSV(n = 14) | Other respiratory(n = 27) | Non-respiratory(n = 36) | p Value between the three groups | |
| Gestational age weeks) | 26 (24–31) | 27 (24–31) | 28 (25–31) | 0.449 |
| Birth weight (g) | 820 (650–1826) | 1012 (680–1434) | 927 (515–1520) | 0.552 |
| Maternal steroids (%) | 85 | 89 | 78 | 0.743 |
| Surfactant (%) | 86 | 85 | 78 | 0.733 |
| IPPV (%) | 100 | 96 | 97 | 1.000 |
| CPAP (%) | 86 | 48 | 83 | 0.006 |
| HFOV | 8 | 12 | 0 | 0.086 |
| Nitric oxide | 7 | 11 | 3 | 0.410 |
| PDA | 29 | 37 | 33 | 0.709 |
| Air leak | 14 | 22 | 8 | 0.320 |
| Postnatal | 36 | 48 | 29 | 0.320 |
| Dexamethasone | ||||
| At lung function | ||||
| Age (years) | 10.5 (8.9–12.1) | 10.2 (8.5–11.8) | 10.4 8.9–11.9) | 0.569 |
| Height (cm) | 135 (119–151) | 137 (122–159) | 141 (123–160) | 0.204 |
| Weight (kg) | 29.7 (18.6–39.4) | 30.0 (21.6–46.9) | 34.4 (20.4–65.0) | 0.038 |
| PEF* | 67.8 (27.1–99.3) | 75.7 (59.1–121.0) | 77.4 (27.4–140) | 0.261 |
| FVC* | 89.6 (75.1–124.5) | 94.7 (72.3–125.1) | 93.1 (68.7–118.3) | 0.496 |
| FEV0.75* | 68.2 (48–99) | 82.3 (53.7–105.3) | 81.5 (47.2–132.9) | 0.051 |
| FEV0.75/FVC | 78.9 (52.9–97.1) | 87.2 (60–96.7) | 86 (63–116.2) | 0.070 |
| FEF25* | 67.0 (32–94) | 79.9 (35.8–107.4) | 74.9 (27.7–131.2) | 0.651 |
| FEF50* | 50.7 (22.5–92.9) | 68.5 (23.2–109.8) | 71.7 (21.8–165.4) | 0.077 |
| FEF75* | 40.7 (24–60) | 52.7 (11.5–101.6) | 60.7 (14.5–220.6) | 0.012 |
*Results are expressed as percentage predicted for height.
CPAP, continuous positive airway pressure; FEF, forced expiratory flow; FEF25, flow at 25% of vital capacity; FEF50, flow at 50% of vital capacity; FEF75, flow at 75% of vital capacity; FEV, forced expiratory volume; FVC, forced vital capacity; HFOV, high frequency oscillatory ventilation; IPPV, intermittent positive pressure ventilation; PDA, patent ductus arteriosus; PEF, peak expiratory flow; RSV, respiratory syncytial virus.