The severity of urinary incontinence in women. Comparison of subjective and objective tests

Validity of a self-administered questionnaire, with reference to a clinical stress urinary incontinence test

OBJECTIVE

To estimate the criterion validity of a self-administered questionnaire on urinary incontinence (UI) using a clinical stress UI test as reference.

MATERIAL AND METHODS

A total of 4710 women aged 20-59 years randomly selected from the municipalities of Aarhus and Randers (Denmark) participated in a population survey on UI. A sub-sample of 96 women stratified by the duration and frequency of UI answered an assisted, self-administered questionnaire concerning UI during the preceding 6 months. Subsequently, a clinical stress UI test was performed with the researchers being blinded with regard to the questionnaire information.

RESULTS

Based on the clinical stress test and questionnaire, 22 (22.7%) and 21 women (21.6%) had stress UI, respectively. UI occurring in more than drops and UI lasting for > 4 weeks were found to be adequate predictors of UI (odds ratio 8.9 and 4.6; p < 0.001 and p < 0.05). Regarding all forms of UI, the agreement between the stress UI test result and the questionnaire data ranged from 51.0% to 77.1%. The probability of finding a positive stress UI test was 62% among women who answered that UI had lasted for > 4 weeks and occurred in more than drops, compared to 22.9% in the total study group. The sensitivity and specificity of the stress UI test among women in whom UI lasted for > 4 weeks and occurred in more than drops were 22.7% and 95.9%, respectively.

CONCLUSIONS

These findings suggest that there is a greater probability of finding severe UI if the women have experienced it in more than drops and it has lasted for > 4 weeks and it is therefore necessary to estimate the degree of incontinence further by means of a stress UI test. In contrast, women who experienced UI in less than drops and for a duration of < 4 weeks only suffered from a very mild degree of UI.

The relationships among measures of incontinence severity in women undergoing surgery for stress urinary incontinence

PURPOSE

We assessed the relationships among severity measures of urinary incontinence in women with stress predominant symptoms enrolled in a randomized clinical trial comparing 2 surgical techniques (Burch colposuspension vs pubovaginal sling) for stress urinary incontinence.

MATERIALS AND METHODS

A total of 655 women underwent a standardized preoperative assessment that included the Medical, Epidemiological and Social Aspects of Aging questionnaire, Urogenital Distress Inventory, Incontinence Impact Questionnaire, 3-day voiding diary, 24-hour pad test, a supine empty bladder stress test and Valsalva leak point pressure measurements. Correlations were estimated using Spearman correlation coefficients and 95% confidence intervals. T tests at alpha=0.05 were conducted to compare the distributions of the continuous severity measure between patients with positive and negative supine empty bladder stress test.

RESULTS

Baseline mean scores on Medical, Epidemiological and Social Aspects of Aging, Urogenital Distress Inventory and Incontinence Impact Questionnaire were 25.8, 151 and 171, respectively. Mean incontinence episode frequency and pad weight were 3.2 per day and 43.5 gm, respectively. Supine empty bladder stress test was positive in 218 patients, and 428 patients had valid Valsalva leak point pressure measurements with a mean Valsalva leak point pressure of 80 cm H(2)O. Weak to moderate correlations were observed between Medical, Epidemiological and Social Aspects of Aging, incontinence episode frequency, pad weight, Incontinence Impact Questionnaire and Urogenital Distress Inventory. On the other hand, Valsalva leak point pressure correlated poorly with all variables measured. The sensitivity and specificity of the supine empty bladder stress test to predict intrinsic sphincter dysfunction were 49% and 60%, respectively.

CONCLUSIONS

Urinary incontinence severity measures correlate moderately with each other at best. While Medical, Epidemiological and Social Aspects of Aging demonstrated stronger correlations with the other measures of severity and quality of life, Valsalva leak point pressure did not. Supine empty bladder stress test did not demonstrate a clinically significant association among severity measures.

Urgency assessment in the evaluation of overactive bladder (OAB)

Overactive bladder (OAB) is a highly prevalent urinary condition with a profound affect on quality of life. Urinary urgency is the cornerstone symptom that defines OAB and drives all subsequent OAB symptoms. The clinical assessment and measurement of urgency has been limited by its definition, limited understanding of well-defined pathophysiology, and psychometric measurement properties. This review outlines the important issues relevant to the clinical assessment and measurement scales commonly used to evaluate and measure urinary urgency. This will have important implications toward further understanding and advancing the field of overactive bladder.

Clinical and urodynamic features according to subjective symptom severity in female urinary incontinence

AIMS

The aim of this study was to determine the relationship between subjective symptom severity and clinical or urodynamic parameters and to compare these parameters according to subjective symptom severity.

METHODS

A total of 268 female patients with grade II (n = 94) and grade III (n = 174) according to the Ingelman-Sundberg scale were included in the study. Mean patient age was 55.9 years (range 28-80). Of 268 patients, 196 women (73.1%) complained of stress urinary incontinence (SUI) and 72 (26.9%) reported additional symptoms of urge urinary incontinence (UUI). Fifty-four (20.1%) women previously had hysterectomies and 12 (4.5%) underwent surgery for UI.

RESULTS

Patients with severe incontinence (grade III) are older, have longer duration of symptoms, concomitant urgency or UUI, and low maximal urethral closure pressure and low Valsalva leak point pressure (VLPP). No difference in other characteristics including pad test loss and urethral mobility was observed in the two groups. In the multivariate logistic regression analysis, a longer duration of symptoms was associated with an increased likelihood of severe symptoms (P = 0.025). Patients with mixed incontinence were at five-fold increased risk of severe symptoms compared with those with SUI only (P = 0.011). In the same model, increasing VLPP was associated with a decreased likelihood of severe symptoms (P = 0.037).

CONCLUSIONS

Longer symptom duration, mixed incontinence and low VLPP have independent effects on the severity of incontinence. Our findings suggest that incontinent patients with sphincteric impairment or urge component may have and increased probability of severe symptoms.

Does condition-specific quality of life correlate with generic health-related quality of life and objective incontinence severity in women with stress urinary incontinence?

AIMS

We examined the impact of stress urinary incontinence (SUI) on health-related quality of life (QOL) and evaluated the relationships between incontinence-specific QOL and objective disease severity.

METHODS

A total of 158 women (mean age 49.9) suffering from SUI were included in the study. The Medical Outcomes Study Short Form-36 (SF-36) and the King's Health Questionnaire (KHQ) were used to assess QOL in the patient and control groups.

RESULTS

The SF-36 scores did not show any significant differences between the two groups except for one domain (physical functioning, P = 0.005). The patient KHQ scores were significantly lower than those of the controls (P < 0.001 for all domains). The scores of the KHQ domains correlated with those of the SF-36 domains, but the relationship was low to moderate, ranging from -0.033 to -0.686. However, they did not correlate with Valsalva leak point pressure (VLPP). When patients were divided into the low VLPP group (n = 60) and the higher VLPP group (n = 98), statistically significant differences were found between the groups for general health domains of the SF-36 (P = 0.010) and of the KHQ (P = 0.027). No statistically significant differences were found in other domains of both questionnaires.

CONCLUSIONS

The generic QOL instrument is not a sensitive tool for measuring QOL in women with SUI. In addition, our findings suggest that objective disease severity is not associated with generic or incontinence-specific QOL.

Seven-year follow-up of the tension-free vaginal tape procedure for treatment of urinary incontinence

OBJECTIVE

To evaluate the long-term cure rates and late complication rates after treatment of female urinary stress incontinence with the minimally invasive tension-free vaginal tape operation.

METHODS

Prospective observational, 3-center cohort study originally of 90 women requiring surgical treatment for primary urinary stress incontinence. Assessment variables included a 24-hour pad weighing test, a stress test, visual analog scale for assessing the degree of bother, and a questionnaire assessing the subjective perception of the women on their continence status.

RESULTS

The follow-up time was a mean of 91 months (range 78-100 months). Both objective and subjective cure rates were 81.3% for the 80 women available for follow-up. Asymptomatic pelvic organ prolapse was found in 7.8%, de novo urge symptoms in 6.3%, and recurrent urinary tract infection in 7.5% of the women. No other long-term adverse effects of the procedure were detected.

CONCLUSION

The tension-free vaginal tape procedure for treatment of female urinary stress incontinence is effective over a period of 7 years.

Significance of pad test loss for the evaluation of women with urinary incontinence

AIMS

The aim of this study was to determine whether the objective incontinence severity, as measured by the pad test, correlated with urethral parameters, and if the objective incontinence severity was differentiated by the incontinence types and also, if it influenced the patient's clinical outcome.

METHODS

Two hundred seventy-four female patients who had undergone a tension-free vaginal tape procedure between March 1999 and May 2003 were retrospectively reviewed. The 1 hr pad test was carried out as recommended by the International Continence Society, with some modification. The mean patient age was 55.1 years (range: 28-80). Two hundred-one women (73.3%) that complained of stress urinary incontinence and another 73 women (26.7%) that had additional symptoms of urge incontinence were enrolled as study subjects. A cure for incontinence, after the tension-free vaginal tape procedure, was defined as the absence of a subjective complaint of leakage and the absence of objective leakage on stress testing, and all other cases were considered failures.

RESULTS

In linear regression analysis, the Valsalva leak point pressure (VLPP) was the only explanatory variable influencing the objective incontinence severity. The urine leakage was significant higher in the mixed urinary incontinence group than in the stress urinary incontinence group (39.7 +/- 7.5 g vs. 30.3 +/- 2.8 g, P < 0.05). For the total patients, the failure group had a more severe preoperative objective severity than the cure group (53.2 +/- 16.6 vs. 32.0 +/- 3.0, P < 0.05). Upon a subgroup analysis, a similar result was found in the stress urinary incontinence group (87.1 +/- 8.2 vs. 29.8 +/- 2.8, P < 0.05) but not in the mixed urinary incontinence group.

CONCLUSIONS

Our findings suggest that the amount of urine leakage as measured during the pad test may be associated with the clinical outcome, after the anti-incontinence surgery.

Urinary incontinence in women under 65: quality of life, stress related to incontinence and patterns of seeking health care

OBJECTIVE

We sought to describe quality of life, psychological stress and patterns of seeking health care (PSHC) among young and middle-aged women experiencing urinary stress incontinence (USI). Reasons and variables associated with delay in seeking care were also investigated.

METHODS

A sample of 131 patients, aged 22-65, filled out a questionnaire consisted of: SF-36, stress related to incontinence, patterns of seeking health care questionnaires and a 10 cm visual analogue scale (VAS) measuring perceived suffering from USI (0 indicating absence of suffering while 10 indicating most severe suffering).

RESULTS

Scores on eight domains of SF-36 were lower, compared to 405 Israeli healthy women (p < 0.001). Forty-one percent reported impairment in performing work and other activities. Mean scores on the VAS was 5.04 (SD: 2.59), 30% marked 7 cm and higher and 12.6% reported most severe suffering due to USI (scored 10 cm). Psychological stress related to incontinence was higher among the younger women and those with severe impairment to sexual activity. The majority of the sample (74%) delayed seeking help for at least a year, 46% delayed it for 3 years. Common reasons for delay were lack of time (36.3%), shame (15.7%) and fear of surgery (14.7%). Age, psychological stress, perceived suffering and social functioning (SF) were associated with patterns of seeking care.

CONCLUSIONS

USI causes suffering and impaired quality of life among young women. Reluctance to seek help highlights the need to promote women's knowledge of treatment options and cure prospects.

The use of Visual Analog Scale in urogynecologic research: a psychometric evaluation

OBJECTIVE

The purpose of this study was to assess the validity of Visual Analog Scales in urogynecologic research.

STUDY DESIGN

In phase I, 35 women completed short forms of the urogenital distress inventory, incontinence impact questionnaire, and Beck depression inventory fast screen using the Likert-type scale and Visual Analog Scale formats. Reliability was estimated with Spearman's correlations and Cronbach's alpha; construct validity was assessed with the use of factor analyses. In phase II, 101 women were recruited for the test-retest reliability assessment of the Visual Analog Scale formats of the urogenital distress inventory and incontinence impact questionnaire short forms. Reproducibility was analyzed with intraclass correlations.

RESULTS

In phase I, correlations between the Likert-type scale and the Visual Analog Scale were good: urogenital distress inventory (0.748), incontinence impact questionnaire (0.787), and Beck depression inventory fast screen (0.852; P <.05). In phase II, intraclass correlations were 0.898 and 0.938 for the urogenital distress inventory and incontinence impact questionnaire scores, respectively ( P <.001).

CONCLUSION

The Visual Analog Scale is a simple, reliable, and reproducible method for the assessment of quality of life in urogynecologic research.

Impact of urinary and climacteric symptoms on social and sexual life after surgical treatment of stress urinary incontinence in women: a long-term outcome

AIM

The aim of the present study was to evaluate the long-term results of surgical treatment of stress urinary incontinence (SUI) using both subjective and objective methods.

BACKGROUND

Few studies have focused on the influence of biological and social changes in a woman's life on the long-term outcome of surgical treatment of stress urinary incontinence.

METHODS

The study included 45 women with genuine SUI treated with either retropubic urethrocystopexy (n=30) or puboccocygeal repair (n=15). The assessment included interviews, questionnaires, urinary diary, pad test, continence test and urodynamic investigation.

RESULTS

The results were evaluated at intervals of 3 months, 1 year and 5--7 years after the treatment. One year after the surgical treatment 71% of the women in the urethrocystopexy group and 80% in the pubococcygeal repair group were subjectively cured, while 5--7 years after surgery the corresponding values were 43% vs. 60%. However, according to pad test a 67% of the women in the urethrocystopexy group and 47% in the pubococcygeal repair group had ceased to leak urine 1 year after the operation whereas at the long-term follow-up the corresponding values were 64% vs. 71%. According to the questionnaire at the long-term follow-up only 35% of the women in the whole group had genuine SUI whereas 21% had urge-incontinence. Moreover, 37% experienced sweating, 23% flushing and 44% vaginal dryness. The number of women with adiposity had increased significantly (P < 0.001) at the long-term follow-up. Twenty-eight per cent of the women decreased their activities whereas the majority experienced no impediment. Seventy-nine per cent reported that they were sexually active and the majority reported satisfaction with their sexual lives.

CONCLUSIONS

Accurate assessment of postoperative results of SUI demands rigorous recording of subjective and objective data taking into consideration psychological and social factors, otherwise there is a high risk of bias in the interpretation of the results of the treatment for SUI. This study indicates that, in order to give women with SUI adequate treatment the nursing care should comprehend the women's divergent experiences of urinary incontinence and its impact on social and sexual life.

A severity index for epidemiological surveys of female urinary incontinence: comparison with 48-hour pad-weighing tests

In epidemiological surveys of female urinary incontinence, it is not feasible to demonstrate urine loss objectively. The aim of this study was to develop a valid epidemiological instrument (a severity index) for assessing the severity of incontinence. The severity index is based on information about frequency (four levels) and amount of leakage (two or three levels). By multiplication, an index value (1-8 or 1-12) is reached. This index value is further categorized into a severity index of three or four levels. The index was compared with the results of 315 pad-weighing tests performed by 265 women in hospital and general practice. Data from an epidemiological survey were also re-analyzed by applying the four-level severity index. Mean pad-weighing results (grams per 24 hours, 95% confidence interval) for the three-level severity index was slight (6; 2-9), moderate (17; 13-22), and severe (56; 44-67). For the four-level severity index, the results were slight (6; 2-9), moderate (23; 15-30), severe (52; 38-65), and very severe (122; 84-159). Spearman's correlation coefficient for pad-weighing results and the three-level severity index was 0.47 (P < 0.01) and for the four-level severity index 0.54 (P< 0.01). The four-level severity index gave a more balanced distribution among the women in the clinical materials, and data from the epidemiological survey showed that the four-level severity index identifies a sub-group of older women with very severe incontinence. The four-level severity index seems to be a valid representation of incontinence severity as measured by pad-weighing tests in women presenting for clinical care. It should be considered a potentially valid measure of incontinence severity in epidemiological studies. Neurourol. Urodynam. 19:137-145, 2000.

The prevalence of stress incontinence during pregnancy and following delivery

OBJECTIVES

To examine the variation in findings from epidemiological studies which describe the prevalence of stress incontinence during and after pregnancy, and to undertake a prospective survey of the prevalence of stress incontinence during pregnancy and following childbirth in order to provide clarification of the findings presented in the literature.

DESIGN

A review of the literature was undertaken using the Medline and Popline CD Rom. A postal questionnaire was sent to a sample of women when they reached 34 weeks' gestation and repeated at 8 weeks postpartum.

PARTICIPANTS

1008 women were recruited to the study when they attended the antenatal clinic at two hospitals in the north west of England. Seven hundred and seventeen (71%) women responded to the first questionnaire and 572 (57%) completed the second questionnaire.

FINDINGS

The prevalence of stress incontinence during pregnancy reported in the literature ranges from 20 to 67%. Following delivery the reported prevalence is between 6 and 29%. In the present study 59% of women reported stress incontinence during pregnancy, and 31% following delivery. Ten per cent of the women had daily episodes of incontinence during their pregnancy, 2% of all women reported daily incontinence following delivery. An association was found between parity and stress incontinence, with women of higher parity being more likely to experience the condition. No difference in the prevalence of stress incontinence was found between women who had a normal delivery and those having an instrumental delivery. A caesarean section was found to be associated with a lower incidence of stress incontinence compared with a normal spontaneous delivery.

KEY CONCLUSION

A high proportion of women experienced stress incontinence during pregnancy and/or following delivery. Some women reported severe symptoms, with leakage on a daily basis. Women of higher parity were more likely to suffer from the condition. Whilst women who had a normal spontaneous delivery or an instrumental delivery reported a similar level of stress incontinence, women who had a caesarean section were less likely to have the condition.

An open study of the bladder neck support prosthesis in genuine stress incontinence

OBJECTIVE

To determine the proportion of unselected women with genuine stress incontinence in whom a bladder neck support prosthesis could be fitted successfully by three gynaecologists with no prior knowledge of the device, and to measure efficacy of the device.

DESIGN

Prospective interventional study.

SETTING

Two metropolitan urodynamic units.

SAMPLE

Eighty women with genuine stress incontinence.

MAIN OUTCOME MEASURES

Average number of leaks per day on a frequency volume chart, average number of pads worn per day, urine loss on a one-hour pad test, and urine flow rate.

RESULTS

Of the 80 recruits, 11 had exclusion criteria and four could not be fitted at the first visit. Of 65 participants, 39 (58%) withdrew from the study before week four. In 20 of 39 women (51%) post-surgical scarring made fitting difficult, and six (15%) withdrew for unrelated personal or medical reasons. In five women (13%) the device was never effective; six withdrew because of adverse events and two required devices that were larger or smaller than those presently available. Thus 38 of 65 participants (58%) could be fitted by the three gynaecologists. Of 26 women who wore the device for four weeks, median leaks per day fell from 2.5 (interquartile range (IQR) 1.9-4.6) to 1.0 (IQR 0-2); median number of pads per day fell from 1.5 (IQR 0.5-3) to 0 (IQR 0-1); and median pad test loss fell from 19 g/h (IQR 8-49) to 2 g/h (IQR 0-8). Sixteen of these 26 patients (62%) achieved objective success, six (23%) were socially continent, one failed to respond and three declined to complete all outcome measures. Urine flow rates revealed no evidence of outflow obstruction. At the sixth month, 18 of 26 patients (69%) were wearing the device successfully; 15 of these women continued to the 12th month, and all but one were objectively dry.

CONCLUSIONS

The bladder neck support prosthesis is a useful addition to the range of treatments available for the management of genuine stress incontinence, but may be difficult to fit in women who are oestrogen-deprived or have undergone multiple surgical procedures. The demands of the trial protocol were found to be onerous by frail elderly women.

Outcome measures for urinary incontinence

OBJECTIVES; To discuss the rudiments of data that need to be collected in order to develop validated, reproducible, well-accepted efficacy instruments for assessing treatment outcomes in urinary incontinence (UI).

METHODS

Information is presented from two reports issued by the Urodynamics Society: "Definition and Classification of Urinary Incontinence" and "Standards of Efficacy for Evaluation of Treatment Outcomes in Urinary Incontinence."

RESULTS

Instruments to assess the efficacy of treatment should be reliable and valid. Such instruments include structured histories, questionnaires, structured physical examinations, urodynamics, voiding diaries, and pad tests. Recommended primary outcome variables include the number of incontinent episodes, volume of urinary loss, and type of incontinence. Secondary measures include patient satisfaction, quality of life, bladder symptoms, uroflow, postvoid residual urine, and other urodynamic variables. General considerations for the development of clinical trials include 1) using a standard lexicon, 2) consistent timing of follow-up, 3) proper outcome assessment at each follow-up, 4) proper data collection, 5) proper data analysis, and 6) formulating conclusions that are supported by the data.

CONCLUSIONS

At the present time, there are no validated, reproducible, well-accepted efficacy instruments for assessing treatment outcomes in UI. Further work directed toward the development of such instruments is warranted.

Periurethral implantation of glutaraldehyde cross-linked collagen (Contigen) in women with type I or III stress incontinence: quantitative outcome measures

OBJECTIVE

To evaluate the effectiveness of periurethral collagen (Contigen) implantation as a treatment for stress incontinence, using quantitative measures of urine loss and the patients' subjective response.

PATIENTS AND METHODS

Twelve women, age range 46-87 years, had video urodynamic testing--confirming Type I or III stress urinary incontinence and were eligible for periurethral collagen implant. Eleven had had at least one anti-incontinence operation. One woman was withdrawn from the study because of a severe subcutaneous skin reaction 21 days after the skin-test and one patient declined follow-up. Ten patients had up to two implants each, introduced 3-5 months apart under local anaesthetic (5 mL collagen per implant). All patients underwent 10 h pad tests (with 2-hourly pad changes) at baseline and 8 weeks after collagen implant. The following quantitative measures of incontinence severity and voiding function were studied: urine loss during the 10 h test, number of wet pads, weight of urine in the wettest pad, maximum voided volume, residual volume on ultrasound, maximum flow rate and urinary flow curve pattern. Blind to the quantitative results, patients were asked to categorize their outcome as cured, improved and failed.

RESULTS

There was a significant decrease in urine loss (P = 0.007), number of wet pads (P = 0.05) and weight of the wettest pad (g) (P = 0.03) from baseline to 8 weeks after the second collagen implant. There was no significant difference at any point in maximum voided volume, maximum urinary flow rate and residual volume after voiding measured on ultrasound. Objectively, two women appeared cured (< 5 g urine loss on 10 h pad test); subjectively, both reported themselves as improved (not cured); one subject stated she was cured and on pad test had 11 g urine loss; two women stated there was no change yet urine loss decreased markedly by > 60% from 434 g to 123 g and 533 g to 199 g. The remaining six stated they were improved although, objectively, their urine loss after the collagen implant remained high (mean 132 g, range 87-185).

CONCLUSION

These results show a significant reduction in urine loss at 8 weeks after the second collagen implant and an objective cure rate of 18%. There was little relationship between the objective measure of success and the self-report. Of interest is the fact that no obstructive changes occurred in the voided amount, the flow curve and the residual volume after voiding.

Distress associated with urinary incontinence, as measured by a visual analogue scale

OBJECTIVES

To estimate patients' subjective perception of having urinary incontinence by using a visual analogue scale, and to assess the scale as a preliminary diagnostical tool.

DESIGN

Four groups: middle age or elderly, urge or stress symptoms. Interviews by using a symptom questionnaire, and scores by using a visual analogue scale.

SUBJECTS

Thirty-six women aged 40-60 years, and fourty women aged 70 or elderly were randomly selected from a resource and information centre for incontinent people.

MAIN RESULTS

Women generally experienced urinary incontinence as distressing. Women with urge symptoms had higher scores than women with stress symptoms, and the middle aged women scored higher than the elderly. The study did not support the view that a visual analogue scale can be used as a diagnostic tool.