The Impact of Bariatric Surgery on Pelvic Floor Dysfunction: A Systematic Review

Abstract

Objective: To determine the effect of bariatric surgery (BS) on the prevalence of pelvic floor dysfunctions (PFD), specifically on urinary incontinence (UI), pelvic organ prolapse (POP), and fecal incontinence (FI).

Data sources: A systematic review (PROSPERO registration no. CRD42017068452) with a literature search was performed using the PubMed, Scopus, and SciELO databases for all publications related to BS and PFD, with no language restrictions, from inception to September 2018.

Methods of study selection: Two authors screened for study eligibility and extracted data. Only prospective cohorts assessing women with morbid obesity and the prevalence of PFD before and after BS in multiple academic and private centers were included. UI, POP, and FI were defined according to the International Urogynecological Association/International Continence Society joint consensus, and diagnosis was made based on self-report or questionnaires.

Tabulation, integration, and results: Our search strategy retrieved 957 results. Of those, 28 studies were included for full analysis, and 20 studies (n = 3684 patients) were selected for final analysis. The main reasons for exclusion were missing data before and after BS (n = 7) and combined data of men and women who underwent BS (n = 1). Laparoscopic Roux-en-Y gastric bypass was the most common surgical technique. Pooled analysis (16 studies) showed that women had a mean body mass index reduction of 12.90 kg/m² after treatment (95% confidence interval [CI], -14.82 to -10.97; p < .0001). The relative risk reduction was 67% (n = 19; odds ratio [OR], 0.33; 95% CI, 0.26-0.41; p < .0001) for UI, 52% (n = 5; OR, 0.48; 95% CI, 0.22-1.07; p = .07) for POP, and 20% (n = 9; OR, 0.80; 95% CI, 0.53-1.21; p = .29) for FI. Funnel plots for UI and FI did not suggest any publication bias. With regard to the standardized questionnaires for PFD, the International Consultation on Incontinence-Short Form, Pelvic Floor Impact Questionnaire-7 and its subscale Colorectal-Anal Impact Questionnaire-7, Pelvic Floor Distress Inventory-20, and its subscale Urinary Distress Inventory-6 showed statistically significantly lower scores. Sexual function, represented by the Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire-12, showed no statistically significant improvement after surgery.

Conclusion: BS has a significant impact on reducing UI, but FI and POP, in obese women.

Keywords: Bariatric surgery; Fecal incontinence; Pelvic organ prolapse; Systematic review; Urinary incontinence.