Table 1 Comparisons of infant and perinatal characteristics and neonatal outcomes among networks (ANZNN, CNN, SNQ) for very low gestational age cohort and very low birth weight cohort derived from network admissions 2008–2011
Very low gestational age | Very low birth weight | |||||||
|---|---|---|---|---|---|---|---|---|
Networks | ANZNN | CNN | SNQ | P-value | ANZNN | CNN | SNQ | P-value |
Total number | 13,586 | 12,167 | 3427 | 11,307 | 10,327 | 2701 | ||
Infant and Perinatal Characteristics | ||||||||
Gestational age, mean(SD) | 28.5(2.2) | 28.3(2.2) | 28.3(2.4) | <0.0001 | 28.3(2.6) | 28.2(2.6) | 27.9(2.7) | <0.0001 |
Birth weight, mean(SD) | 1232 396) | 1209 (387) | 1234 (424) | <0.0001 | 1082 (274) | 1068(267) | 1055 (291) | <0.0001 |
Male sex | 7345 (54.1) | 6617 (54.5) | 1838 (53.6) | 0.6619 | 5762 (51.0) | 5290(51.3) | 1372 (50.8) | 0.8571 |
Small for gestational age | 1249 (9.2) | 1133 (9.3) | 317 (9.3) | 0.9515 | 2369 (21.0) | 2082(20.2) | 521 (19.3) | 0.0999 |
Singleton | 9532 (70.2) | 8417 (69.3) | 2441 (71.3) | 0.0478 | 7901 (69.9) | 7099(68.8) | 1930 (71.5) | 0.016 |
Surfactant required | 7336 (54.1) | 7179 (59.0) | 1941 (56.8) | <0.0001 | 6442 (57.1) | 6233(60.4) | 1649 (61.3) | <0.0001 |
Antenatal steroid use | 12,902 (95.1) | 10,156 (86.6) | 3278 (95.7) | <0.0001 | 10,723 (95.0) | 8520(85.7) | 2581 (95.6) | <0.0001 |
Caesarean | 8478 (62.7) | 7117 (59.0) | 2086 (61.2) | <0.0001 | 7311 (65.0) | 6565(64.1) | 1679 (62.7) | 0.0613 |
Presentation (vertex) | 8676 (65.4) | 7307 (64.7) | 2209 (65.7) | 0.3872 | 7099 (64.2) | 6004(63.0) | 1720 (65.3) | 0.0353 |
Maternal age, mean(SD) | 29.8 (6.4) | 30.5 (5.9) | 29.9 (6.5) | <0.0001 | 29.7 (6.5) | 30.5(6.0) | 29.8 (6.6) | <0.0001 |
Neonatal Outcomes | ||||||||
Mortality | 987 (7.3) | 986 (8.1) | 265 (7.7) | 0.0407 | 948 (8.4) | 945(9.2) | 252 (9.3) | 0.0841 |
Severe neurological injury | 758 (5.6) | 1409 (9.4) | 220 (6.4) | <0.0001 | 711 (6.3) | 1293(10.1) | 202(7.5) | <0.0001 |
Severe retinopathy of prematurity | 496 (3.7) | 592 (4.9) | 146 (4.3) | <0.0001 | 487 (4.3) | 596(5.8) | 144 (5.3) | <0.0001 |
Necrotising enterocolitis | 591 (4.4) | 690 (5.7) | 143 (4.2) | <0.0001 | 566 (5.0) | 641(6.2) | 134 (5.0) | 0.0002 |
Chronic lung disease | 2381 (17.5) | 2597 (21.3) | 629 (18.4) | <0.0001 | 2233 (19.8) | 2472(23.9) | 586 (21.7) | <0.0001 |
Composite adverse outcome | 3893 (28.7) | 4564 (36.5) | 1043 (30.4) | <0.0001 | 3649 (32.3) | 4272(40.3) | 962 (35.6) | <0.0001 |
Nosocomial Infection | 2008 (14.8) | 2188 (18.0) | 484 (14.1) | <0.0001 | 1869 (16.5) | 2069(20.0) | 454 (16.8) | <0.0001 |