Prediction of Obstetric Anal Sphincter Injury in Nulliparous Women: Model Development and Temporal Validation

Key Points

• The study aims to develop and validate a prediction model for obstetric anal sphincter injury (OASI) in nulliparous women during delivery.
• Developed prediction models for spontaneous and operative vaginal deliveries
• Validated models using temporal validation techniques
• Focused on nulliparous women, those giving birth for the first time
• The models effectively identify women at high risk for OASI
• Demonstrated significant predictive accuracy during the validation phase
• Can assist in decision-making for delivery methods based on risk assessment