Table 1. Demographics.
| Variables | Lived | Died | P-value | Died <7 days | Died ⩾7 days | P-value |
|---|---|---|---|---|---|---|
| Number of patients | 5594 | 1505 | 993 | 512 | ||
| Prenatal variables | ||||||
| Maternal age, median (10–90th percentile) | 26 (19–36) | 26 (18–36) | 0.3 | 26 (18–36) | 26 (18–36) | 0.3 |
| Inborn | 4350 (77.8) | 1090 (72.4) | 0.01 | 725 (73) | 365 (71.3) | 0.4 |
| Antenatal steroids | 3476 (62.1) | 972 (64.6) | 0.07 | 631 (63.5) | 341 (66.6) | 0.3 |
| Maternal tocolytics | 2339 (41.8) | 637 (42.3) | 0.7 | 420 (42.3) | 217 (42.4) | 0.9 |
| Maternal antibiotics | 2396 (42.8) | 667 (44.3) | 0.3 | 446 (44.9) | 221 (43.2) | 0.5 |
| Male | 3060 (54.7) | 891 (59.2) | 0.002 | 592 (59.6) | 299 (58.4) | 0.6 |
| Cesarean section | 3448 (61.6) | 952 (63.3) | 0.2 | 639 (64.4) | 313 (61.1) | 0.19 |
| Multiples | 1347 (24.1) | 298 (19.8) | 0.02 | 192 (19.3) | 106 (20.7) | 0.3 |
| Race | ||||||
| American/Alaska native | 56 (1) | 17 (1.1) | 0.7 | 12 (1.2) | 5 (1) | 0.8 |
| Asian | 123 (2.2) | 39 (2.6) | 0.8 | 26 (2.6) | 13 (2.5) | 0.8 |
| Black | 1269 (22.7) | 465 (30.9) | 0.01 | 312 (31.4) | 153 (29.9) | 0.5 |
| Hispanic | 1393 (24.9) | 397 (26.4) | 0.3 | 257 (25.9) | 140 (27.3) | 0.4 |
| White | 2478 (44.3) | 494 (32.8) | 0.01 | 333 (33.5) | 161 (31.4) | 0.5 |
| Other | 275 (4.9) | 93 (6.2) | 0.06 | 53 (5.3) | 40 (7.8) | 0.07 |
| Perinatal variables | ||||||
| Gestational age, median (10–90th percentile) | 30 (25–35) | 26 (24–32) | 0.001 | 26 (24–32) | 25 (23–31) | 0.01 |
| Birth weight, median (10–90th percentile) | 1.32 (0.72–2.5) | 0.82 (0.55–1.6) | 0.001 | 0.86 (0.6–1.7) | 0.74 (0.5–1.4) | 0.001 |
| APGAR 1 min, median (10–90th percentile) | 7 (2–8) | 5 (1–8) | 0.001 | 5 (1–8) | 5 (1–8) | 0.1 |
| APGAR 5 min, median (10–90th percentile) | 8 (6–9) | 7 (4–9) | 0.1 | 8 (5–9) | 7 (4–9) | 0.001 |
| Severe intraventricular hemorrhage (grades 3, 4) | 283 (5.1) | 264 (17.5) | 0.01 | 139 (14) | 125 (24.4) | 0.01 |
| Number of patients with major anomaliesa | 467 (8.3) | 138 (9.2) | 0.1 | 70 (7) | 68 (13.3) | 0.01 |
| Age at diagnosis, median (10–90th percentile) | 15 (4–40) | 18 (7–42) | 0.01 | 18 (7–40) | 19 (7–47) | 0.1 |
| Time diagnosis to death, median (10–90th percentile) | 2 (0–57) | 1 (0–4) | 30 (9–121) | 0.001 | ||
| Age at discharge, median (10–90th percentile) | 60 (25–125) | 27 (9–91) | 0.001 | 19 (8–42) | 53.5 (24.3–152) | 0.001 |
a
Most common anomalies were gastroschisis, trisomy 21 and heart anomalies.
Data are presented as N (%) except continuous data, which is presented as median (10–90th percentile).