Logistic regression for evaluating associations between selected variables and CS in study groups
| P values | OR (95% CI) | |
| Group 1 | ||
| Maternal age | 0.018 | 0.95 (0.85 to 0.97) |
| BMI at delivery | 0.022 | 0.89 (0.85 to 0.91) |
| EA administration | 0.037 | 0.59 (0.43 to 0.77) |
| Group 3 | ||
| Maternal age | <0.001 | 0.93 (0.89 to 0.96) |
| BMI at delivery | 0.023 | 0.98 (0.96 to 0.99) |
| EA administration | 0.810 | 0.99 (0.97 to 1.05) |
BMI, body mass index; CS, caesarean section; EA, epidural administration.