Maternal Age (mean)

Parity (median)

History of preterm labour

(no. of patients)

Time from sample taking to delivery in hours (mean, range)

Idiopathic—case

30

0

3

22, 0.5 - 192

Idiopathic—control

29

0

0

N/A

Chorioamnionitis—case

31

0

0

61, 1 - 336

Chorioamnionitis—control

31

0

0

N/A

Ischaemic—case

29

0

1

81, 7 - 192

Ischaemic—control

27

0

1

N/A