Objective To evaluate the prevalence and predictors of anal incontinence (AI) in late pregnancy and 1 year after delivery.Design Prospective population-based cohort study. Setting Two maternity units in Norway 2009-2010.Population Primiparae aged 18 years or over.Methods Primiparae answered questions on the St. Mark's score about AI during the last 4 weeks of pregnancy. One year later, the same questionnaires were distributed by postal mail. Socio-economic and delivery-related data were obtained from hospital records.Main outcome measures Self-reported AI.Results Answers on AI in late pregnancy were obtained from 1571 women, and 1030 responded 1 year later. Twenty-four per cent experienced one and 4.7% experienced three or more AI symptoms in late pregnancy. One year later, this was reduced to 19% and 2.2%, respectively. Multivariate logistic regression analyses were applied. Formed and loose stool incontinence were strongly associated at both time points. The main predictor of AI 1 year after delivery was AI in late pregnancy. Obstetric anal sphincter injury increased the risk of incontinence of stool and flatus (odds ratio [OR], 4.1; 95% confidence interval [CI], 1.7-9.6) after delivery. Urgency was associated with greater age (OR, 1.8; 95% CI, 1.0-3.3) and operative delivery (OR, 2.0; 95% CI, 1.3-2.9).Conclusion One in four primiparae experienced AI in late pregnancy. One year later, still one in five suffered from incontinence. Sphincter injury predicted incontinence of stool and flatus, whereas greater age and operative delivery predicted urgency. The identification and adequate follow-up of pregnant women with AI may reduce AI after delivery.

Objective To evaluate the effect of pelvic floor muscle exercises (PFME) for postpartum anal incontinence (AI).Design A parallel two-armed randomised controlled trial stratified on obstetrical anal sphincter injury with primary sphincter repair and hospital affinity.Setting Ano-rectal specialist out-patient clinics at two hospitals in Norway.Population One hundred and nine postpartum women with AI at baseline. MethodsThe intervention group received 6 months of individual physiotherapy-led PFME and the control group written information on PFME. Changes in St. Mark's scores and predictors of post-intervention AI were assessed by independent samples t-tests and multiple linear regression analyses, respectively. The study was not blind.Main outcome measures The primary outcome measure was change in AI symptoms on the St. Mark's score from baseline to post-intervention. Secondary outcome measures were manometry measures of anal sphincter length and strength, endoanal ultrasound (EAUS) defect score and voluntary pelvic floor muscle contraction.Results There was a significant difference in the reduction of St. Mark's scores from baseline to post-intervention in favour of the PFME group (À2.1 versus À0.8 points, P = 0.040). No differences in secondary outcome measures were found between groups. Baseline St. Mark's, PFME group affinity and EAUS defect score predicted post-intervention St. Mark's score in the imputed intention-to-treat analyses. The analysis on unimputed data showed that women performing weekly PFME improved their AI scores more than women in the control group did.Conclusions Our results indicate that individually adapted PFME reduces postpartum AI symptoms.

Objective To evaluate the association between different types of anal incontinence (AI) and Quality of Life (QoL) in late pregnancy.Design Cross-sectional study.Setting Two maternity units in Norway 2009-2010.Population Primiparae aged 18 or over.Methods Participants answered questions about AI during the last 4 weeks of pregnancy on the St. Mark's score and impact of QoL in the Fecal Incontinence QoL score. Socioeconomic data were obtained from hospital records.Main outcome measures Self-reported AI and impact on QoL.Results 1571 primiparae responded; 573 (37%) had experienced AI during the last 4 weeks of pregnancy. One third of the incontinent women reported reduced QoL in the domain 'Coping'. 'Women experiencing urgency alone reported markedly better QoL compared to any other AI symptoms. AI appeared to have the strongest impact on the domains 'Coping' and 'Embarrassment'. Depression was only associated with experiencing the combination of all three symptoms [odds ratio (OR) 13; 95%confidence interval (CI) 3.2-51]. Experiencing flatus alone weekly or more was associated with the highest impact on 'Embarrassment' (OR 20; 95%CI 6.4-61) compared with all other symptoms or combination of AI symptoms, except the combination of all three AI symptoms.Conclusions Between 3 and 10% of the primiparae in this material experienced AI to such a extent that it affected QoL. The greatest impact was seen in the QoL domain 'Coping'. These findings highlight the importance of an increased awareness of AI in late pregnancy among health professionals and the need to implement routine discussions about AI with expectant and new mothers.

Nearly 50% reported incontinence symptoms 1 year after first delivery. Continence status during pregnancy was one of the main predictors of postpartum continence status. Mode of delivery increased the risk of postpartum UI, whereas obstetric anal sphincter injuries increased the risk of postpartum DI.