Variable

Adjusted OR

IC (95%)

p

Dilatation > 3 cm

4.6

3.2 - 10.6

0.0001

Parity > 3

1.6

1.2 - 2.1

0.0001

Indication of previous cesarean fetal destress

2.4

1.9 - 6

0.0004

Malpresentation

2.8

1.2 - 5

0.0006

Birth weight

1.4

1.1 - 2.6

0.0009