Table 5.
Logistic Regression for Prediction of Need for Instrument Use.
Variable
Odds Ratio
Confidence Interval (95%)
Epidural analgesia
3.01
2.225–4.075
Induced labor
1.703
1.25–2.32
Nulliparous
3.425
2.495–4.701
Birth weight >4 kg
1.779
1.095–2.89