Table 1

Patient characteristics

Gestational age (weeks)nBirth weight (g)*Male n (%)Caesarean section n (%)Apgar score* at 1 min/5 minCord vein pH*SGA† n (%)Infants with asphyxia‡ n (%)Ventilation support n (%)
*Expressed as medians (range); †SGA, small for gestational age (<−2.0 SD gestational age adjusted mean birth weight15); ‡asphyxia defined as venous cord blood pH <7.26 or Apgar score <7 at 5 minutes.
24–2721 790 (515–1180)15 (71)16 (76)6 (2–9)/8 (3–9)7.31 (7.02–7.43)9 (43)8 (38)21 (100)
28–30251150 (770–1850)10 (40)19 (76)7 (2–9)/8 (2–9)7.30 (6.90–7.50)7 (28)9 (36)23 (92)
31–33341820 (1140–2710)21 (62)28 (82)8 (3–9)/9 (6–10)7.31 (7.08–7.48)10 (30)7 (20)17 (50)
34–36452460 (1670–3740)25 (56)29 (64)9 (0–9)/8 (4–10)7.32 (6.89–7.48)13 (29)10 (22)17 (38)