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Parameters of multivariate logistic regression for predicting PTL.
| Preterm Labor | Normal Delivery | Total | P Value | OR | |||
|---|---|---|---|---|---|---|---|
| Early preterm <34 weeks | Late preterm 34-37 weeks | ||||||
| Cervical length <30 | Number | 17 | 10 | 11 | 38 | <0.0001 | Late=11.9 |
| % | 44.7% | 26.3% | 28.9% | 100.0% | Early=15.5 | ||
| Cervical length ≥30 | Number | 34 | 26 | 340 | 400 | ||
| % | 8.5% | 6.5% | 85.0% | 100.0% | |||
| Total | Number | 51 | 36 | 351 | 438 | ||
