Table 4. Comparison of maternal and perinatal outcome between vaginal birth after caesarean section and repeat caesarean section, China, 2012–2016.
| Outcome | Weighted rate (no. of births)a |
cRR (95% CI)d | aRR (95% CI)e | |
|---|---|---|---|---|
| Vaginal birth after caesarean sectionb | Repeat caesarean sectionc | |||
| Maternal | ||||
| No. of uterine ruptures per 1 000 births | 2.1 (195) | 6.5 (6 415) | 0.32 (0.21–0.50) | 0.26 (0.16–0.42) |
| No. of blood transfusions per 1 000 births | 10.0 (814) | 14.4 (10 780) | 0.69 (0.59–0.82) | 0.68 (0.53–0.87) |
| No. of hysterectomies per 1 000 births | 0.5 (39) | 0.4 (288) | 1.28 (0.82–2.02) | 0.78 (0.45–1.32) |
| No. of ICU admissions per 1 000 births | 1.2 (134) | 3.1 (3 595) | 0.39 (0.24–0.63) | 0.36 (0.25–0.52) |
| Maternal mortality before discharge per 100 000 births | 7.6 (9) | 3.5 (33) | 2.15 (1.08–4.27) | 1.26 (0.55–2.90) |
| Perinatal | ||||
| No. of intrapartum stillbirths per 1 000 birthse | 8.8 (801) | 0.5 (401) | 19.18 (15.5–23.73) | 7.20 (6.09–8.51) |
| No. of 5-minute Apgar scores < 7 per 1 000 live birthsf | 8.4 (706) | 2.8 (2 230) | 3.00 (2.43–3.70) | 1.75 (1.54–1.99) |
| No. of neonatal deaths before discharge per 1 000 live birthsg | 3.4 (297) | 0.8 (649) | 4.31 (3.54–5.26) | 1.90 (1.61–2.24) |
aRR: adjusted relative ratio; CI: confidence interval; cRR: crude relative ratio; ICU: intensive care unit.
a No. of births represents all births if not indicated live births.
b The sample for vaginal birth after caesarean section were 82 778 births and 77 826 live births.
c The sample for repeat caesarean sections were 788 858 births and 787 371 live births.
d We weighted the rate for sampling distribution of population and adjustment for clustering of births within hospitals.
e We adjusted the cRR for year, region, hospital level, number of obstetricians, day of week, number of antenatal care visits, education and marital status, maternal age, number of caesarean section in previous pregnancy, gestational age and birth weight.
f Information about perinatal outcome was missing from 62 (0.01%) births. We excluded 5175 (0.59%) antepartum stillbirths from the total number of births.
g We restricted the analysis to live births.