Final model—severe adverse neonatal outcome
| OR (95% CI) | P value | |
| Ethnicity | ||
| Caucasian | 1 | |
| Indigenous | 1.03 (0.60 to 1.79) | 0.91 |
| Asian | 0.66 (0.51 to 0.86) | 0.002 |
| Other | 0.73 (0.54 to 1.00) | 0.049 |
| SEIFA score | 0.998 (0.996 to 0.999) | 0.003 |
| Nulliparous | 1.50 (1.18 to 1.90) | 0.001 |
| IOL | 1.34 (1.07 to 1.69) | 0.01 |
| Method of birth | ||
| SVD | 1 | |
| Instrumental | 5.69 (3.41 to 9.49) | <0.001 |
| Emergency CS | 3.15 (2.17 to 4.57) | <0.001 |
| Elective CS | 1.33 (0.94 to 1.88) | 0.11 |
| EFW z-score | 0.88 (0.79 to 0.97) | 0.01 |
| CPR z-score | 0.88 (0.79 to 0.98) | 0.02 |
CS, caesarean section; CPR, cerebroplacental ratio, EFW; estimated fetal weight; IOL, induction of labour; SVD, spontaneous vaginal delivery.o.