Table 1.
General characteristics of the study population
| Characteristics | No (%) | EOS (No tot) |
LOS (No tot) |
No tot |
|---|---|---|---|---|
| Gestation week | (65) | (292) | 357 | |
| Extremely pre-term (GW 22–27) | 216 (60.5) | 8 | 208 | |
| Very pre-term (GW 28–32) | 74 (20.8) | 10 | 64 | |
| Late pre-term (GW 33–36) | 20 (5,6) | 8 | 12 | |
| Full-term (GW 37–42) | 47 (13.1) | 39 | 8 | |
| Days in NICU (median) | 69.0 | 357 | ||
| Male sex | 217 (60.7) | 357 | ||
| Birth weight | (63) | (291) | 354 | |
| Extremely low birth weight (< 1000 g) | 210 (59.3) | 10 | 200 | |
| Very low birthweight (< 1500 g) | 66 (18.6) | 4 | 62 | |
| Low birthweight (< 2500 g) | 22 (6.2) | 8 | 14 | |
| Normal birthweight (≥ 2500 g) | 56 (15.8) | 41 | 15 | |
| APGAR-score at 5 min (median) | 7.0 | 332 | ||
| Vaginal delivery | 116 (33.4) | 37 (64) | 79 (283) | 347 |
| Prenatal factors | ||||
| Maternal risk of infection | 108 (31.4) | 26 (63) | 82 (281) | 344 |
| Antenatal steroids | 220 (73.6) | 15 (63) | 205 (236) | 299 |
| Postnatal inventions | ||||
| Intubationa | 255 (73.1) | 21 (64) | 234 (285) | 349 |
| Surfactant treatment | 213 (61.6) | 13 (64) | 200 (282) | 346 |
| Central catheter during NICU-stay | 288 (81.6) | 37 (64) | 251 (290) | 353 |
| UVC | 196 (58.7) | 21 (64) | 175 (270) | 334 |
| UAC | 255 (75.9) | 24 (64) | 231 (272) | 336 |
| pCVC | 222 (64.5) | 15 (63) | 206 (281) | 344 |
| Congenital condition | 356 | |||
| None | 320 (89.9) | 60 | 263 | |
| Heart disease | 13 (3.6) | 3 | 10 | |
| GI-anomaly | 6 (1.7) | 0 | 6 | |
| Kidney disease/UT-anomaly | 4 (1.1) | 0 | 4 | |
| CNS-anomaly | 1 (0.3) | 1 | 0 | |
| Chromosomal syndrome | 10 (2.8) | 1 | 9 | |
| Malignancy | 2 (0.6) | 0 | 2 |
aAll patients that were given surfactant are included in the group, regardless of later continuous intubation. GW gestation week, NICU neonatal intensive care unit, UVC umbilical venous catheter, UAC umbilical arterial catheter, pCVC peripheral central venous catheter, GI gastrointestinal, UT urinary tract, CNS central nervous system