Table 1

Ascertainment of Fetal Hypoxia1 Among Neonates

Test(s)

Subjects tested

All tests positive

At least one test positive


Number of subjects

%

Number of subjects

%


All three tests

26

1

4

12

46


Two tests


Fetal scalp and umbilical arterial blood pH

178

27

15

77

43


Umbilical arterial and venous pH

41,245

3,583

9

8,866

21


Fetal scalp and umbilical venous blood pH

4

0

0

0

0


One test


Fetal scalp pH

47

16

34

16

34


Umbilical arterial blood pH

75,775

7,727

10

7,727

10


Venous umbilical blood pH

3,561

385

11

385

11


Any of the three tests

120,836

11,739

10

17,083

14


1: fetal scalp pH < 7.25, umbilical artery pH < 7.20, or umbilical venous pH < 7.28

Burstyn et al. BMC Medical Research Methodology 2011 11:2   doi:10.1186/1471-2288-11-2

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