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Objective: To prospectively assess change in bowel symptoms and quality of life (QoL) approximately 3 years after primary repair of obstetric anal sphincter injuries (OASIS). Methods: Between July 2002 and December 2007 women who attended the perineal clinic at Croydon University Hospital, UK, 9 weeks following primary repair of OASIS were asked to complete the Manchester Health Questionnaire and a questionnaire to obtain a St Mark incontinence score. All women had endoanal scans at this visit. In June 2008 all women were asked to complete the questionnaires again. Results: Of 344 patients who responded to the questionnaires and were included in the analysis, long-term symptoms of fecal urgency, flatus incontinence, and fecal incontinence occurred in 62 (18.0%), 52 (15.1%), and 36 (10.5%), respectively. Overall, there was a significant improvement in fecal urgency (P < 0.001) and flatus incontinence (P < 0.001) from 9 weeks to 3 years. Of 31 women with fecal incontinence symptoms at early follow-up, 28 were asymptomatic at 3 years. However, 33 women developed de novo symptoms. The only predictors of fecal incontinence at 3 years were fecal urgency at 9 weeks (OR 4.65; 95% CI, 1.38-15.70) and a higher St Mark score (OR 1.40; 95% CI, 1.09-1.80). Conclusion: Following primary repair of OASIS, the majority of symptoms and QoL significantly improve, unless there is a persistent anal sphincter defect. This highlights the importance of adequate repair. (C) 2014 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved.