Table 3. Maternal and perinatal outcomes in MCNs with low, moderate or high induction of labor rates.
(NTSV group, excluding planned caesarean section/congenital anomalies).
| Q1 (low) n = 50419 |
Q2-3 (moderate) n = 89139 |
Q4 (high) n = 38360 |
||||
|---|---|---|---|---|---|---|
| n | % (95% CI) | n | % (95% CI) | n | % (95% CI) | |
| Mode of birth | ||||||
| Spontaneous vaginal** | 36883 | 73.2 (72.8–73.5) | 63972 | 71.8 (71.5–72.1) | 26825 | 69.9 (69.5–70.4) |
| Assisted vaginal** | 7329 | 14.5 (14.2–14.8) | 13513 | 15.2 (14.9–15.4) | 6200 | 16.2 (15.8–16.5) |
| Unplanned caesarean section** | 5148 | 10.2 (9.9–10.5) | 10742 | 12.1 (11.8–12.3) | 4891 | 12.8 (12.4–13.1) |
| unknown | 1059 | 2.1 (2.0–2.2) | 912 | 1.0 (1.0–1.1) | 444 | 1.2 (1.1–1.3) |
| Maternal outcomes | ||||||
| Postpartum blood loss (PPH) > 1000 cc** | 3776 | 7.5 (7.3–7.7) | 6989 | 7.8 (7.7–8.0) | 2653 | 6.9 (6.9–7.2) |
| 3rd/4th degree perineal tear** | 1957 | 3.9 (3.7–4.1) | 3085 | 3.5 (3.3–3.6) | 1127 | 2.9 (2.8–3.1) |
| Episiotomy** | 15688 | 31.1 (30.7–31.5) | 30707 | 34.4 (34.1–34.8) | 14880 | 38.8 (38.3–39.3) |
| Unfavorable maternal outcomes composite** (non-spontaneous birth, PPH, 3rd/4th degree tear) | 16718 | 33.8 (33.4–34.2) | 31571 | 35.7 (35.4–36.1) | 13763 | 36.3 (35.8–36.8) |
| Perinatal outcomes | ||||||
| Apgar score 5 min <7# | 946 | 1.9 (1.8–2.0) | 1517 | 1.7 (1.6–1.8) | 687 | 1.8 (1.7–1.9) |
| Apgar score 5 min < 4# | 170 | 0.3 (0.3–0.4) | 294 | 0.3 (0.3–0.4) | 116 | 0.3 (0.3–0.4) |
| Perinatal mortality up to day 7# | 66 | 0.13 (0.10–0.17) | 130 | 0.15 (0.12–0.17) | 42 | 0.11 (0.08–0.15) |
| NICU admission** | 402 | 0.8 (0.7–0.8) | 756 | 0.8 (0.8–0.9) | 404 | 1.1 (1.0–1.2) |
| Adverse perinatal composite* (mortality, AS<4, NICU) | 518 | 1.0 (0.9–1.1) | 980 | 1.1 (1.1–1.2) | 482 | 1.3 (1.1–1.4) |
Missings in variables are not shown. Due to missings, numbers not always add up to the total number in Q1, Q2-3 and Q4. Percentages are calculated on valid numbers. Outcomes were tested statistically (Chi Square)
CI: confidence interval
# no statistically significant difference, p> 0.05
* statistically significant difference, p < 0.05
** statistically significant difference, p< 0.001