Table 2.
Outcome measures in cases with spontaneous onset of labor
| No previous caesarean section group (n = 9812) | Previous caesarean section group (n = 996) | p-value | |
|---|---|---|---|
| Adverse composite outcome (n, %) | 1535 (15.6%) | 222 (22.3%) | < 0.0001 |
| Neonatal death (n, %) | 0 | 1 (0.1%) | 0.0922 |
| Maternal death (n, %) | 0 | 0 | n.c |
| Caesarean section (n, %) | 807 (8.2%) | 153 (15.4%) | < 0.0001 |
| pH < 7.00 | 25 (0.3%) | 5 (0.5%) | 0.1913 |
| Base excess < −16 | 31 (0.3%) | 6 (0.6%) | 0.1484 |
| Apgar score after 5 min < 5 (n, %) | 29 (0.3%) | 5 (0.5%) | 0.2371 |
| Transfer to neonatal care unit (n, %) | 826 (8.4%) | 90 (9.0%) | 0.5047 |
| Uterine rupture (n, %) | 2 (0.02%) | 10 (1.0%) | < 0.0001 |
| Placental abruption (n, %) | 32 (0.3%) | 11 (1.1%) | 0.0014 |
| Mode of vaginal delivery | |||
| Spontaneous delivery | 8227 (91.4%) | 708 (84.0%) | < 0.0001 |
| Vaginal operative delivery | 778 (8.6%) | 135 (16.0%) | |
| pH < 7.10 | 240 (2.5%) | 37 (3.7%) | 0.0151 |
| Base excess < −12 | 210 (2.2%) | 32 (3.2%) | 0.0297 |
| Apgar score after 5 min | 9.7 ± 0.8 | 9.6 ± 0.9 | 0.0020 |
| Meconium stained liquor (n, %) | 1282 (13.1%) | 146 (14.7%) | 0.1572 |
| Abnormal cardiotocography (n, %) | 1368 (13.9%) | 224 (22.5%) | < 0.0001 |
| Fetal blood analysis (n, %) | 259 (2.6%) | 62 (6.2%) | < 0.0001 |
| Suspected triple I (n, %) | 27 (0.3%) | 4 (0.4%) | 0.5255 |
| Shoulder dystocia (n, %) | 76 (0.8%) | 10 (1.0%) | 0.4374 |