Table 3. Potential risk factors of uterine rupture in women with prior caesarean section.
| Crude OR (95% CI) | AOR (95% CI) | ||||
|---|---|---|---|---|---|
| Maternal age, years | <20 | 1.03 | (0.31–3.24) | 0.97 | (0.29–3.16) |
| 20–35 | 1 | 1 | |||
| >35 | 0.85 | (0.50–1.45) | 0.90 | (0.55–1.49) | |
| Marital status | Married/cohabited | 1 | 1 | ||
| Single | 1.15 | 1.00 | (0.45–2.22) | ||
| Education, years | ≤6 | 2.97 | (1.85–4.77)*** | 1.71 | (1.02–2.87)* |
| 7–9 | 1.31 | (0.73–2.35) | 1.06 | (0.61–1.87) | |
| 10–12 | 0.70 | (0.41–1.19) | 0.64 | (0.36–1.12) | |
| >12 | 1 | 1 | |||
| Number of previous CS | 1 | 1 | 1 | ||
| 2 | 1.09 | (0.62–1.92) | 0.96 | (0.60–1.55) | |
| ≥3 | 1.63 | (0.79–3.39) | 1.36 | (0.64–2.88) | |
| Gestational age, weeks | <37 | 4.70 | (3.11–7.11)*** | 3.52 | (2.14–5.77)*** |
| ≥37 | 1 | 1 | |||
| Birth weight, grams | <2,500 | 3.32 | (2.09–5.28)*** | 1.42 | (0.85–2.36) |
| ≥2,500 | 1 | 1 | |||
| Onset of labour | Spontaneous | 1.94 | (1.12–3.32)* | 1.62 | (1.06–2.46)* |
| Induced | 1.91 | (0.86–4.24) | 1.79 | (0.79–4.02) | |
| Pre-labour | 1 | 1 | |||
| Fetal presentation | Cephalic | 1 | 1 | ||
| Non-cephalic | 1.98 | (1.08–3.64)* | 1.48 | (0.83–2.64) | |
| Facility capacity | High | 1 | 1 | ||
| Medium | 1.05 | (0.54–2.06) | 0.98 | (0.55–1.72) | |
| Low | 2.11 | (1.08–4.14)* | 1.21 | (0.65–2.26) | |
| Country HDI | Very high & high | 1 | 1 | ||
| Medium | 2.28 | (1.20–4.36)* | 2.00 | (1.06–3.77)** | |
| Low | 5.13 | (2.91–9.04)*** | 3.88 | (2.05–7.33)*** | |
AOR, adjusted odds ratio; CI, confidence interval; CS, caesarean section; HDI, Human Development Index; OR, odds ratio.
Women without uterine rupture served as a comparison group in the regression model.
Crude odds ratios were adjusted for survey design. Adjusted odds ratios were derived from a multilevel logistic regression model, which included all of the variables in Table 3 with random effects of health facility.
*p < 0.05 **p < 0.01 ***p < 0.001.