Parameter

p-values

N1; N2

Birth weight

0.21

47; 8

Gestational age

0.62

37; 9

Weight at entry

0.055

51; 8

Age at OP

0.07

52; 8

Haemoglobin concentration

0.15

50; 8

Haematocrit

0.32

49; 7

Chloride

0.09

21; 8

Base excess

0.40

51; 7

Standard bicarbonate

0.40

47; 7

Carbon dioxide partial pressure

0.60

50; 7

Lactate

0.96

27; 6

Glucose

0.0001

46; 7