Research Article
Mode of Vaginal Delivery: A Modifiable Intrapartum Risk Factor for Obstetric Anal Sphincter Injury
Table 4
Summary of multivariate analysis results.
| Variable | Coeff. | | OR | CI 95% Lower OR | CI 95% Upper OR |
| Neonatal weight (grams) | 0.001 | 0.002 | 1.001 | 1.000 | 1.001 |
| Mode of delivery | Spontaneous delivery | | | 1 | | | Instrumental delivery | Vacuum | 0.920 | 0.087 | 2.509 | 0.876 | 7.189 | Forceps | 1.408 | <0.001 | 4.089 | 2.406 | 6.949 | Thierry spatulas | 1.569 | <0.001 | 4.804 | 2.962 | 7.792 |
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Reference group.
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