Changes in the lower urinary tract in continent women and in women with stress urinary incontinence, according to menopausal status.

The aim of this study was to assess the impact of the postmenopausal period on clinical and urodynamic parameters and on the mobility of the bladder neck in continent women and in women with stress urinary incontinence. Fifty-seven postmenopausal women were studied: 30 were continent and 27 had stress urinary incontinence. They were subdivided according to postmenopausal stage into groups A (<5 years) and B (>5 years). Five years was a good marker to separate those women with mild and severe estrogen deficiency. Fifteen premenopausal incontinent women were selected for bladder neck ultrasound as controls. All underwent history, general physical and gynecologic examinations, LH and FSH determinations, type 1 urine and uroculture, circadian voiding diary, cotton-swab test, bladder neck ultrasound and urodynamic investigations. Analysis of the voiding diaries revealed a higher frequency of daytime micturition in both groups of incontinent patients than in the continent ones. Increased bladder neck mobility was also found, both in the cotton-swab test and an ultrasound, in group A and an ultrasound in the premenopausal incontinent women. Urodynamic investigation showed decreased bladder capacity at the first micturition urge, as well as decreased urinary volume in the group A patients compared to the continent ones. Decreased urethral closure maximum pressure was also found in group B patients in relation to the continent ones. We concluded that the effect of hypoestrogenism, manifested postmenopause, causes changes in the lower urinary tract of women, particularly those who are incontinent.