A Motion-based Device Urinary Incontinence Treatment: A Longitudinal Analysis at 18 and 24 Months

Abstract

Introduction and hypothesis: There are sparse data regarding the long-term efficacy of pelvic floor muscle training (PFMT) for the treatment of urinary incontinence (UI). The objective of this study was to evaluate the impact of an 8-week PFMT program guided by a motion-based intravaginal device versus a standard home program over 24 months. Methods: Between October 2020 and March 2021, a total of 363 women with stress or stress-predominant mixed UI were randomized and completed an 8-week PFMT program using a motion-based intravaginal device (intervention group) or a home program following written/video instructions (control group). Participants were not asked to continue training after the 8-week program. At 18 and 24 months’ follow-up, the Urogenital Distress Inventory, short-form (UDI-6) and Patient Global Impression of Improvement (PGI-I) were collected. In the original trial, a total of 139 participants in each arm were needed to detect a 0.3 effect size (alpha = 0.05, power 0.8, one-tailed t test) in the difference in UDI-6 scores. Results: A total of 231 participants returned 24-month data. Mean age at 24 months was 51.7 ± 14.5 years, and mean BMI was 31.8 ± 7.4 kg/m2. Mean change in UDI-6 scores from baseline to 24 months was greater in the intervention group than the control group (−21.1 ± 24.5 vs −14.8 ± 19.4, p = 0.04). Reported improvement using PGI-I was greater in the intervention group than in the control group at 24 months (35% vs 22%, p = 0.03, OR 1.95(95% CI 1.08, 3.57). Conclusions: Pelvic floor muscle training guided by a motion-based prescription intravaginal device yielded durable and significantly greater UI symptom improvement than a standard home program, even in the absence of continued therapy.