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  • Title: Evolution and risk factors of anal incontinence during the first 6 years after first delivery: a prospective cohort study.
    Author: Johannessen HH, Mørkved S, Stordahl A, Wibe A, Falk RS.
    Journal: BJOG; 2020 Nov; 127(12):1499-1506. PubMed ID: 32418309.
    Abstract:
    OBJECTIVE: To explore changes in prevalence of anal incontinence (AI) from late first pregnancy to 6 years postpartum, and to evaluate possible risk factors for changes in AI during the 6-year period. DESIGN: Prospective longitudinal cohort study. SETTING: Two Norwegian health regions. POPULATION OR SAMPLE: Women with first deliveries between May 2009 and December 2010. METHODS: Participants reported AI in late pregnancy, 6 months, 1 and 6 years after first delivery using postal or digital questionnaires. AI prevalence was calculated, and mixed effects Poisson regression analyses with robust variance were applied. MAIN OUTCOME MEASURES: AI from late pregnancy to 6 years postpartum. RESULTS: Among 1571 participants, 65% had normal vaginal first deliveries, 20% had vaginal deliveries complicated by instrumental intervention and/or obstetric anal sphincter injury (IVD ± OASIS). Nearly 1 in 10 women reported persistent incontinence during the 6 years. The overall AI prevalence was reduced from late pregnancy to 1 year postpartum for all modes of delivery. At 6 years postpartum, women with IVD ± OASIS had a higher AI prevalence (23%; 95% CI 16-30%) compared with women with caesarean section (8%; 95% CI 2-13%) or normal vaginal delivery (12%; 95% CI 9-16%). Moreover, women who were <23 years, ≥34 years, unemployed during first pregnancy, who had active bowel disease (PR: 2.4; 95% CI 2.0-2.7), or bowel evacuation problems during the 6-year period had higher AI prevalence. CONCLUSIONS: Mode of first delivery modified AI prevalence during the 6-year period, whereas age, bowel disease and bowel evacuation problems were associated with higher prevalence of AI from late first pregnancy to 6 years postpartum. TWEETABLE ABSTRACT: Complicated vaginal delivery, age and bowel emptying problems increase the risk of long-term anal incontinence.
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