| Total ( n = 5584) | BW, g | |||||
---|---|---|---|---|---|---|---|
< 1000 ( n = 314) | 1000 – 1499 ( n = 1186) | 1500 – 2499 ( n = 2433) | 2500 – 3999 ( n = 1535) | > 4000 ( n = 116) | P -value | ||
Underlying respiratory disorder | |||||||
 RDS, n(%) | 2945(52.7) | 245(78.5)* | 824(69.4)* | 1371(56.4)* | 482(31.4) | 23(19.8)* | < 0.001 |
 Pneumonia/sepsis, n(%) | 2028(36.3) | 91(29.1)* | 352(29.6)* | 775(31.8)* | 755(49.1) | 55(47.4) | < 0.001 |
 TTN, n(%) | 515(9.2) | 1(0.3)* | 27(2.2)* | 232(9.5)* | 232(15) | 23(29.8) | < 0.001 |
 HIE, n(%) | 158(2.8) | 1( 0.3)* | 7(1186, 0.5)* | 28(1.1)* | 107(6.9) | 15(12.9)* | < 0.001 |
 Apnea, n(%) | 145(2.6%) | 11(3.5%)* | 75(6.3%) | 47(1.9%)* | 12(0.8%) | 0(0) | < 0.001 |
 MAS, n(%) | 95(1.7) | 0(0)* | 0(0)* | 7(0.2)* | 81( 5.2) | 6(5.1) | < 0.001 |
 PPHN, n(%) | 101(1.8) | 1(0.3)* | 6(0.5)* | 12(0.4)* | 74( 4.8) | 8(6,8) | < 0.001 |
Treatment interventions | |||||||
 Non-invasive respiratory support only, n(%) | 3341(59.8) | 87(27.8)* | 742(62.5)* | 1801(74)* | 665(43.2) | 46(39.6) | < 0.001 |
  CPAP initial, n(%) | 2843(50.9) | 66(21) | 595(50.2) | 1580(64.9) | 564(36.7) | 38(32.7) | < 0.001 |
  NIPPV initial, n(%) | 213(3.8) | 14(4.5) | 79(6.7) | 91(3.7) | 26(1.7) | 3(2.6) | < 0.001 |
  BiPAP initial, n(%) | 217(3.9) | 6(1.9) | 51(4.3) | 100(4.1) | 57(3.7) | 3(2.6) | 0.314 |
  HFNC initial, n(%) | 64(1.1) | 1(0.3) | 17(1.4) | 27(1.1) | 17(1.1) | 2(1.7) | 0.536 |
  NHFOV initial, n(%) | 4(0.1) | 0(0) | 0(0) | 3(0.1) | 1(0.1) | 0(0) | 0.722 |
 Non-invasive and invasive respiratory support, n(%) | 1431(25.6) | 154(49.3)* | 359(30.2) | 473(19.4)* | 415(27.1) | 28(24.1) | < 0.001 |
 Invasive respiratory support only, n(%) | 812(14.5) | 71(22.7)* | 85(7.1)* | 159(6.5)* | 455(29.6) | 42(36.2) | < 0.001 |
 Conventional mechanical ventilation, n(%) | 661(11.8) | 56(17.8) | 64(5.4) | 123( 5.0) | 382(24.9) | 36(31) | 0.724 |
 High frequency mechanical ventilation, n (%) | 180(3.2) | 18(5.7) | 14(1.2) | 27(1.1) | 108(7.0) | 13(11.2) | 0.684 |
 A repeat mechanical ventilation, n (%) | 195(8.7) | 77(34.4)* | 73(16.6)* | 23(4.8) | 19(2.2) | 2(2.9) | < 0.001 |
 Escalation to mechanical ventilation from non-invasive ventilation, n(%) | 544(11.4) | 90(37.3)* | 199(18.1)* | 163(7.2) | 84(7.8) | 8(10.8) | < 0.001 |
 PS (overall), n(%) | 2151(38.5) | 226(72.4)* | 647(54.5)* | 849(34.8)* | 404(26.2) | 25(21.5) | < 0.001 |
 PS for RDS, n(%) | 1824(61.9) | 193(78.8)* | 539(65.4) | 759(55.4)* | 317(65.8) | 16(69.6) | < 0.001 |
 PS for MAS, n(%) | 28(32.6) | 2(33.3) | 6(33.3) | 14(31.1) | 6(40) | 0(0) | 0.845 |
 iNO therapy, n(%) | 153(2.7) | 11(3.5) | 18(1.5)* | 18(0.7)* | 95(6.1) | 11(9.4) | < 0.001 |
 Caffeine therapy, n(%) | 1954(35.3) | 254(81.1)* | 864(73.4)* | 762(31.5)* | 71(4.7) | 3(2.6) | < 0.001 |
 ECMO, n(%) | 12(0.2) | 1(0.3) | 4(0.3) | 5(0.2) | 1(0.06) | 1(0.8) | 0.301 |