Lower Urinary Tract Symptoms in Relation to Leiomyoma Volume, Location, and Position in Reproductive-aged Women in the USA.

Introduction And Hypothesis: Uterine leiomyomata are widely believed to contribute to lower urinary tract symptoms in women, but it is unclear whether leiomyoma size, position, and location have important implications for these symptoms. We assessed whether greater leiomyoma volume, anterior position, and subserosal location were associated with urinary incontinence and frequent urination in a racially diverse, nationwide sample of premenopausal women in the USA.

Methods: A cross-sectional analysis of 477 premenopausal women from 12 USA sites undergoing evaluation for laparoscopic radiofrequency ablation or myomectomy for leiomyomata was carried out. Multivariable logistic regression models examined associations between leiomyoma volume, position, and location documented in clinical imaging reports and participant-reported urinary incontinence and distressing urination frequency, adjusting for age, race, parity, and body mass index.

Results: Among the 477 participants, 27.9% reported at least weekly incontinence, 72.8% distressing daytime urination frequency, and 63.4% frequent night-time urination. Greater total leiomyoma volume was associated with at least weekly incontinence of any type (OR 1.05, 95% CI 1.02-1.07, per 20-ml increase) and at least weekly stress-predominant incontinence (OR 1.04, 95% CI 1.01-1.07, per 20-ml increase), but not distressing daytime or night-time urination frequency. Although subserosal leiomyoma position was associated with a 2.01-fold (95% CI 1.14-3.56) greater odds of frequent night-time urination, no significant associations between leiomyomata location or position and incontinence were detected.

Conclusion: In this multicenter sample of women seeking treatment for symptomatic leiomyomata, greater leiomyomata volume was associated with weekly any-type and stress-type incontinence, but leiomyoma position and location were not independently associated with urinary incontinence.