Table 3 Multivariate analysis of parameters associated with obstetric anal sphincter injury
Parameter | OR (95% CI) | P value | OR (95% CI) | P value |
|---|---|---|---|---|
≤21 years | 26–35 years | |||
Age | 0.90 (0.69–1.19) | 0.461 | 0.92 (0.85–0.99) | 0.018 |
Prolonged second stage of labor | 0.79 (0.40–1.59) | 0.514 | 0.79 (0.40–1.59) | 0.514 |
Operative vaginal delivery | 1.41 (0.72–2.78) | 0.316 | 2.44 (1.72–3.47) | < 0.001 |
Birth weight > 90th percentile | 0.90 (0.29–2.80) | 0.853 | 2.23 (1.19–4.18) | 0.012 |
Head circumference > 90th percentile | 3.08 (1.48–6.38) | 0.003 | 1.27 (0.76–2.12) | 0.354 |