Comparison of Vaginal Pessaries to Standard Care or Pelvic Floor Muscle Training for Treating Postpartum Urinary Incontinence: a Pragmatic Randomized Controlled Trial.

Introduction: To compare three conservative treatment options, standard care, pelvic floor muscle training (PFMT), and vaginal pessaries, for postpartum urinary incontinence (UI) that are accessible to most patients and practitioners in a generalizable cohort.

Materials and methods: A multicenter, open-label, parallel group, pragmatic randomized controlled clinical trial comparing standard care, PFMT, and vaginal cube pessary for postpartum urinary incontinence was conducted in six outpatient clinics. Sample size was based on large treatment effects (Cramers' V > 0.35) with a power of 80% and an alpha of 0.05 for a 3 × 3 contingency table, 44 patients needed to be included in the trial. Outcomes were analyzed according to the intention-to-treat principle. Group comparisons were made using analysis of variance (ANOVA), Kruskal-Wallis, and chi-square test as appropriate. P < 0.05 was considered statistically significant.

Results: Of the 516 women screened, 111 presented with postpartum UI. Of these, 52 were randomized to one of three treatment groups: standard care (n = 17), pelvic floor muscle training (n = 17), or vaginal cube pessary (n = 18). After 12 weeks of treatment, treatment success, as measured by patient satisfaction, was significantly higher in the vaginal pessary group (77.8%, n = 14/18), compared to the standard care group (41.2%, n = 7/17), and the PFMT (23.5%, n = 4/17; χ ² _2,n = 52  = 14.55; p = 0.006, Cramer-V = 0.374). No adverse events were reported. SUI and MUI accounted for 88.4% of postpartum UI.

Conclusion: Vaginal pessaries were superior to standard care or PFMT to satisfyingly reduce postpartum UI symptoms. No complications were found.