Demographics of the 2014 and 2016 cohorts
| 2014 | 2016 | P value | |
| Total deliveries | 7010 | 7488 | N/a |
| Age (year) | 30.9 (30.8–31.0) | 31.2 (31.1–31.3) | 0.0016 |
| Body mass index (kg/m2) | 24.8 (24.7–24.9) | 24.7 (24.6–24.8) | 0.28 |
| Polycystic ovarian syndrome | 110 (1.57%) | 151 (2.02%) | 0.043 |
| Smoking | 326 (4.65%) | 303 (4.05%) | 0.075 |
| Parity ≥1 | 3228 (46.1%) | 3365 (44.9%) | 0.18 |
| Previous LUSCS | 960 (13.7%) | 1027 (13.7%) | 0.45 |