Urinary incontinence after obstetric anal sphincter injuries (OASIS)-is there a relationship?

This study aimed to compare urinary symptoms and its impact on women's quality of life after obstetric anal sphincter injuries (OASIS) with a matched control group in the short term. The study group consisted of 100 primiparous women with OASIS and 104 controls who sustained a second-degree tear or had a mediolateral episiotomy performed. All women completed a validated International Consultation on Incontinence Questionnaire-Short Form (ICIQ-SF) questionnaire 10 weeks after delivery. Compared to controls, significantly more women with OASIS reported overall urinary incontinence (21.2 vs 38%, p=0.005) and had significantly worse quality of life score (incontinence score: 2.42 vs 1.2; p=0.008). Significantly more women with OASIS suffered from stress urinary incontinence (33 vs 14%; p=0.002; OR 3.06; CI=1.54-6.07) than controls. Logistic regression analysis revealed that OASIS and a prolonged (>50 min) second stage of labour were independent risk factors for the development of stress urinary incontinence. This study highlights the importance of inquiring about urinary incontinence in women with OASIS.