| Variables | OR | 95% CI | p-value |
| Maternal age | 1.020 | 0.881 - 1.206 | 0.803 |
| Parity | 1.367 | 0.670 - 2.634 | 0.370 |
| The interpregnancy time from last CD | 0.992 | 0.951 - 1.021 | 0.609 |
| Gestational age at birth | 1.126 | 0.276 - 3.586 | 0.857 |
| Neonatal weight at birth | 1.000 | 0.998 - 1.002 | 0.762 |
| fLUS | 0.198 | 0.059 - 0.481 | <0.0001 |
| mLUS | 0.031 | 0.0016 - 0.219 | <0.0001 |
| Number of previous CDs | 1.780 | 0.819 - 3.903 | 0.142 |
| Previous CD during labor | 0.480 | 0.025 - 3.034 | 0.476 |