Rates of survival, ‘survival free of major complications,’ delivery room mortality and NICU mortality by gestational weeks, n(%)
| Survival | ‘Survival free of major complications’ | Delivery room mortality | NICU mortality | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | 2000–2004 | 2005–2008 | 2009–2012 | Total | 2000–2004 | 2005–2008 | 2009–2012 | Total | 2000–2004 | 2005–2008 | 2009–2012 | Total | 2000–2004 | 2005–2008 | 2009–2012 | |
| 23 | 11 (4%) | 4 (5%) | 3 (4%) | 4 (4%) | 6 (2%) | 2 (2.5%) | 2 (2.7%) | 2 (2.2%) | 213 (87%) | 64 (80.0%) | 66 (89.2%) | 83 (90.2%) | 22 (2%) | 12 (15%) | 5 (6.8%) | 5 (15.4%) |
| 24 | 150 (34%) | 44 (28%) | 41 (31%)* | 65 (42%)† | 85 (19%) | 29 (19%) | 26 (19%) | 30 (20%) | 155 (35%) | 60 (38.7%) | 51 (38.1%) | 44 (28.6%) | 138 (31.2%) | 51 (32.9%) | 42 (31.3%) | 45 (29.2%) |
| 25 | 345 (56%)‡ | 117 (48%)§ | 103 (62%) | 125 (61%)† | 214 (35%) | 70 (29%)§ | 70 (42%) | 74 (36%) | 49 (8%)‡ | 30 (12.3%) | 11 (6.6%) | 8 (3.9%)† | 220 (35.8%) | 97 (39.8%) | 52 (31.3%) | 71 (34.8%) |
| 26 | 609 (79%) | 190 (75%) | 175 (77%)* | 244 (85%)† | 407 (53%) | 118 (47%)§ | 137 (60%) | 152 (53%) | 17 (2%) | 5 (2.0%) | 7 (3.1%) | 5 (1.7%) | 143 (18.6%) | 59 (23.2%) | 45 (19.8%) | 39 (13.5%)† |
| 27 | 782 (85%)‡ | 281 (79%)§ | 254 (87%) | 270 (90%)† | 592 (64%) | 209 (59%)§ | 200 (69%) | 183 (67%) | 18 (2%) | 7 (2.0%) | 4 (1.4%) | 7 (2.6%) | 122 (13.2%)‡ | 69 (19.3%)§ | 33 (11.3%) | 20 (7.3%)† |
| 28 | 968 (92%) | 314 (89%)§ | 317 (95%) | 337 (92%) | 783 (75%)‡ | 227 (65%)§ | 270 (81%) | 286 (79%)† | 12 (1%) | 2 (0.6%) | 4 (1.2%) | 6 (1.6%) | 73 (6.9%)‡ | 36 (10.2%)§ | 14 (4.2%) | 23 (6.3%) |
| 29 | 1167 (94%) | 378 (93%) | 366 (95%) | 423 (96%) | 1000 (81%) | 314 (78%) | 318 (82%) | 368 (83%) | 13 (1%) | 2 (0.5%) | 3 (0.8%) | 8 (1.8%) | 55 (4.5%) | 25 (6.2%) | 18 (4.7%) | 12 (2.7%) |
| 30 | 1563 (96%) | 531 (96%) | 520 (96%) | 512 (96%) | 1417 (87%) | 475 (86%) | 472 (87%) | 470 (88%) | 16 (1%) | 5 (0.9%) | 7 (1.3%) | 4 (0.7%) | 53 (3.2%) | 17 (3.1%) | 17 (3.1%) | 19 (3.6%) |
| 31 | 1920 (97%) | 642 (97%) | 590 (97%) | 688 (97%) | 1792 (91%) | 589 (90%) | 552 (91%) | 651 (92%) | 12 (1%) | 2 (0.3%) | 3 (0.5%) | 7 (1.0%) | 53 (2.7%) | 20 (3.0%) | 16 (2.6%) | 17 (2.4%) |
| 23–31 | 7515 (84)%‡ | 2501 (82%)§ | 2369 (86%) | 2645 (86%)† | 6296 (71%)‡ | 2033 (67%)§ | 2047 (74%) | 2216 (72%)† | 505 (6%) | 177 (5.8%) | 156 (5.6%) | 172 (5.6%) | 879 (9.9%)‡ | 386 (12.6%)§ | 242 (8.7%) | 251 (8.2%)† |
*Comparison between 2005–2008 and 2009–2012, p<0.01.
†Comparison between 2000–2004 and 2009–2012, p<0.01.
‡General testing for trends (χ2 test), p<0.01.
§Comparison between 2000–2004 and 2005–2008, p<0.01.
NICU, neonatal intensive care unit.