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Strength and Bioelectrical Activity of the Pelvic Floor Muscles and Sexual Function in Women with and without Stress Urinary Incontinence: An Observational Cross-Sectional Study.
Healthcare (Basel, Switzerland) 2023 January 7
Stress urinary incontinence (SUI) results from an increase in intravesical pressure, which exceeds the pressure at which the urethra remains closed. Symptoms cause social and sexual intercourse discomfort directly or indirectly, which affect health-related quality of life and are associated with pelvic floor muscle (PFM) dysfunction. We aimed to verify the variation in strength and PFM bioelectrical activity and sexual function in women with SUI. Additionally, we analyzed the impact of this dysfunction on quality of life. This was an observational cross-sectional study. Women aged 25-55 years with frequent sexual intercourse were included. Women with SUI were included in a study group (G2, n = 17), and those without any type of incontinence were included in a control group (G1, n = 16). Primary outcomes were level of strength and PFM bioelectrical activity and sexual function as determinants of worse SUI in the control group. Secondary outcomes were associated between the primary outcomes and severity of urinary loss, impact on daily life, and quality of life in women with SUI. In the domains evaluated in the Female Sexual Function Index (FSFI), only sexual desire was lower in women with SUI (G2) than in the controls ( p = 0.033). During analysis of G1 variables, a positive and moderate correlation was observed between power/myoeletric activation and maximum voluntary contraction (MVC) ( p < 0.01), peak ( p < 0.01), and mean amplitudes ( p = 0.017). There was a high positive correlation between sexual arousal and other variables, including vaginal lubrication, sexual orgasm, and total FSFI value ( p < 0.001 for all analyses). During evaluation of G2 variables, the MVC was positively correlated with the peak and mean amplitudes ( p < 0.0001). Additionally, there was a high and positive correlation between the mean amplitudes (%MVC) and personal relationships (KHQ) ( p = 0.001); the same was observed between the total (ICIQ) and activities of daily living (ICIQ) ( p < 0.0001). Therefore, women with SUI presented with lower sexual desire and bioelectric activity but were not related to PFM strength. Additionally, the domains of sexual function and certain variables of quality of life are aggravated by SUI.
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