Table 1.
Characteristics of the Infants Who Survived to Discharge Based on the Cumulative Duration of Mechanical Ventilationa
| Cumulative Duration of Mechanical Ventilation, d | ||||
|---|---|---|---|---|
| Characteristic | ≤7 (n = 759) | 8–21 (n = 562) | 22–35 (n = 382) | ≥36 (n = 1164) |
| Demographics | ||||
| Gestational age, median (IQR), wk | 27.3 (26.1–28.6) | 26.4 (25.7–27.6) | 25.9 (25.0–26.7) | 25.0 (24.1–26.0) |
| Birth weight, median (IQR), g | 870 (780–940) | 820 (724–910) | 790 (690–883) | 698 (681–800) |
| Male | 315 (41.5) | 275 (48.9) | 191 (50.0) | 608 (52.2) |
| SGA | 263 (34.7) | 134 (23.8) | 84 (22.0) | 276 (23.7) |
| 5-Minute Apgar score, median (IQR) | 8 (6–8) | 7 (6–8) | 7 (6–8) | 7 (6–8) |
| Treatments and morbidities | ||||
| Surfactant | 530 (69.8) | 399 (71.0) | 293 (76.7) | 917 (78.8) |
| PDA treatment | 274 (36.1) | 289 (51.4) | 238 (62.3) | 811 (69.7) |
| NEC | 15 (2.0) | 39 (6.9) | 17 (4.5) | 139 (11.9) |
| Bacterial sepsis | 160 (21.1) | 204 (36.3) | 163 (42.7) | 684 (58.8) |
| Postnatal dexamethasone treatment | 40 (5.3) | 75 (13.4) | 75 (19.6) | 528 (45.4) |
| Mechanical ventilation duration, median (IQR), d | 3 (2–5) | 14 (10–18) | 29 (25–32) | 59 (46–80) |
| Mechanical ventilation courses, median (IQR), No. | 1 (1–1) | 2 (1–3) | 2 (2–3) | 4 (3–4) |
Abbreviations: IQR, interquartile range; NEC, necrotizing enterocolitis; PDA, patent ductus arteriosus; SGA, small for gestational age.
a
Data are presented as number (percentage) of patients unless otherwise indicated. Differences between categories for all patient characteristics are statistically significant at P < .001.