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Table 3 Incidence of neonatal morbidities and their temporal trends over the years

From: Population based trends in mortality, morbidity and treatment for very preterm- and very low birth weight infants over 12 years

  BPDa No. (%) NECb No. (%) IVHc No. (%) PVLd No. (%) PDAe No. (%) RDSf No. (%) ROPg No. (%) Sepsis No. (%)
1996 - 2008 1 (n = 2983) 470 (15.7) 76 (2.5) 176 (5.9) 66 (2.2) 584 (19.6) 2428 (81.4) 38 (1.2) 291 (9.8)
19961 (n = 702) 125 (17.8) 23 (3.3) 43 (6.1) 12 (1.7) 105 (15.0) 550 (78.3) 13 (1.9) 60 (8.5)
20001 (n = 750) 104 (13.9) 22 (2.9) 51 (6.8) 18 (2.4) 128 (17.1) 584 (77.9) 4 (0.5) 81 (10.8)
20041 (n = 728) 123 (16.9) 17 (2.3) 49 (6.7) 21 (2.9) 148 (20.3) 615 (84.5) 9 (1.2) 65 (8.9)
20081 (n = 803) 118 (14.7) 14 (1.7) 33 (4.1) 15 (1.9) 203 (25.3) 679 (84.6) 12 (1.5) 85 (10.6)
p-value 1996-2008 0.02 0.01 0.02 0.71 < 0.001 < 0.001 0.40 0.03
Gender         
   - female 217 (14.8) 42 (2.9) 75 (5.1) 39 (2.7) 300 (20.5) 1156 (79.1) 14 (1.0) 130 (8.9)
   - male 251 (16.5) 34 (2.2) 100 (6.6) 27 (1.8) 284 (18.7) 1272 (83.6) 22 (1.4) 161 (10.6)
Location of birth         
   - inborn2 417 (15.5) 65 (2.3) 149 (5.5) 59 (2.2) 529 (19.6) 2205 (81.7) 30 (1.1) 267 (9.9)
   - outborn 51 (18.0) 11 (3.9) 26 (9.2) 7 (2.5) 55 (19.4) 223 (78.5) 6 (2.1) 24 (8.5)
Mode of delivery3         
   - spontaneous 100 (19.0) 11 (2.1) 42 (8.0) 10 (1.9) 105 (19.9) 428 (81.2) 13 (2.5) 51 (9.7)
   - caesarean section 353 (15.0) 63 (2.7) 118 (5.0) 53 (2.3) 450 (19.2) 1914 (81.5) 21 (0.9) 234 (10.0)
Number of infants         
   - singleton 365 (17.7) 59 (2.9) 129 (6.2) 53 (2.6) 426 (20.6) 1715 (83.1) 32 (1.5) 216 (10.5)
   - multiples 103 (11.2) 17 (1.9) 46 (5.0) 13 (1.4) 158 (17.2) 713 (77.7) 4 (0.4) 75 (8.2)
Gestational age4         
   < 26 103 (38.7) 16 (6.0) 46 (17.3) 10 (3.8) 111 (41.7) 249 (93.6) 20 (7.5) 55 (20.7)
   26-27 180 (37.0) 17 (3.5) 59 (12.1) 13 (2.7) 183 (37.7) 466 (95.9) 9 (1.9) 98 (20.2)
   28-29 123 (18.0) 18 (2.6) 48 (7.0) 16 (2.3) 160 (23.4) 624 (91.1) 6 (0.9) 80 (11.7)
   30-31 50 (4.4) 18 (1.6) 21 (1.9) 22 (2.0) 113 (10.0) 889 (79.0) 1 (0.1) 42 (3.7)
  1. 1 infants who died in the delivery room were excluded, 2 born in one of the nine perinatal centres, 3 cephalic forceps and cephalic ventouse deliveries were not listed separately, 4 children born > 32 completed gestational weeks were not listed separately, a bronchopulmonary dysplasia, b necrotising enterocolitis, c intraventricular haemorrhage grade III or IV, d cystic periventricular leucomalacia, e patent ductus arteriosus, f respiratory distress syndrome, g retinopathy of prematurity grade 3 or 4