Body mass index ; urodynamic study ; stress urinary incontinence
Abstract
Objective: To identify the relationship of obesity and stress urinary incontinence, and of obesity and urodynamic parameters in patients of stress urinary incontinence in Korea.
Methods: The study included 98 women who were clinically diagnosed as stress urinary incontinence and 102 women, as control group, who were taken total abdominal hysterectomy due to benign gynecologic disease without stress urinary incontinence. We compared body mass index as a parameter of obesity between two groups. Body mass index was defined as weight in kilograms divided by height in square meters. All patients of stress urinary incontinence were taken urodynamic test and we obtained relationship between body mass index and urodynamic parameters by using Pearson correlation coefficiency.
Results: There was no difference in age between two groups(mean±SD, 52.4±8.3; 50.9±3.3, p=0.1). But, body mass index(BMI) was significantly higher in women with SUI then in control group(24.3±2.7; 23.0±3.1), and number of vaginal delivery and parity were more common in women with SUI than in control group too. BMI was significantly higher in women with SUI than women with myoma only among younger group(under age of 52)(24.0±2.3; 22.3±2.1,p=0.001), while parity and number of vaginal delivery were more common in women with SUI group than control group among all age groups. It suggest that the other causes of SUI is more responsible for the development of SUI than obesity in Korea. There was no relationship between BMI and urodynamic parameters among the patients of SUI. Pearson correlation coefficiency was as follows; for Residual urine, 0.502 : for first sensation to void, 0.018 : for Bladder capacity, 0.329 : for peak flow rate, -0.209 : for FUL , 0.269 : for Continence area, 0.262 : for MUCP, 0.229 : for VLPP, -0.100. There was no differenct in age, parity, and BMI between overweight group and normal population among women with SUI(age; 53.3±7.8, 51.3±8.9, p=0.249 : Gravidity; 6.8±3.4, 6.6±2.9, p=0.792 : parity; 3.4±1.4, 3.4±1.4, p=0.961: number of vaginal delivery; 3.4±1.4, 3.4±1.4, p=0.961).
Conclusion: Body mass index was more closely related with stress urinary incontience group than control group. This results srggest that obesity may be an important etiological factor of stress urinary incontinence and pelvic floor dysfunction. There was no relatioship between body mass index and urodynamic parameters.