Characteristics of Mixed Urinary Incontinence and Stress Urinary Incontinence: Relationship between Lower Urinary Tract Symptoms and Urodynamic Parameters

ABSTRACT

PURPOSE: The purpose of this study was to analyze the relationship between lower urinary tract symptoms and urodynamic parameters to investigate the characteristics of mixed urinary incontinence (MUI) and stress urinary incontinence (SUI). METHODS: The subjects were 318 women with MUI and 128 women with SUI. Data were collected retrospectively from electronic medical records including Bristol Female Lower Urinary Tract Symptoms-Scored Form (BFLUTS-SF), Incontinence Quality of Life Instrument (I-QOL), voiding diaries, and urodynamic parameters. RESULTS: Compared with the SUI group, the MUI group was older and showed lower I-QOL and more severe urinary tract symptoms. The MUI group had more urinary frequency, more nocturia, and a higher urgency score than the SUI group. In the correlation analysis, the greatest difference between the two groups was that urgency was associated with Qmax, maximal cystometric capacity, and detrusor condition over activity only in the MUI group (r=−.175, p=.004; r=−.281, p<.001; r=.232, p<.001, respectively). CONCLUSION: As a result of this study, we propose that a customized management program that emphasizes the control of pelvic floor for the MUI group, and one that effectively strengthens the weak pelvic floor for the SUI group.