Elsevier

European Urology

Volume 48, Issue 4, October 2005, Pages 622-627
European Urology

Female Urology – Incontinence
Prevalence of the Overactive Bladder Syndrome by Applying the International Continence Society Definition

https://doi.org/10.1016/j.eururo.2005.04.026Get rights and content

Abstract

Purpose:

To determine the prevalence of the overactive bladder (OAB) syndrome in an urban population by using the International Continence Society (ICS) definition and to determine its impact on quality of life and sexual function.

Methods:

Women and men participating in a health screening project in the area of Vienna completed the Bristol Lower Urinary Tract Symptoms (LUTS) questionnaire. To assess the prevalence of OAB the 2002 ICS definition was applied. In addition, all participants underwent a detailed health examination, including physical assessment, evaluation of life style factors, laboratory study and urinalysis.

Results:

A total of 1199 men and 1219 women aged 20–91 years were analysed. The prevalence of OAB in men (48.5 ± 13.1 years) was 10.2% (OABdry: 8.4%; OABwet: 1.8%) and 16.8% in women (49.5 ± 13.5 years; OABdry:10.3%; OABwet: 6.5%). In women, the prevalence of OABdry remained fairly stable over 6 life decades, while OABwet increased substantially after the age of 40 years. In men OABwet and OABdry increased after the third life decade. In men with OAB, 48% did not report a negative impact on quality of life, 36% had minimal, 9.8% moderate and 2.5% severe impairment; the respective percentages for women were 53%, 33%, 7.3% and 6.3%. OABwet had a more profound impact on quality of life. A negative impact of OAB on sexuality was reported by 24% of men and 31% of women.

Conclusion:

The high prevalence of OAB in this population, its negative impact of quality of life and sexuality underline the importance of this syndrome.

Introduction

According to the International Continence Society (ICS) “urgency, with or without urge incontinence, usually with frequency and nocturia, can be described as the overactive bladder (OAB) syndrome, urge syndrome or urgency-frequency syndrome. These terms can be used if there is no proven infection or obvious pathology” [1]. There is a continuing debate regarding the appropriateness of this definition, it has been questioned whether OAB is really a syndrome, particularly because the symptoms frequency, urgency and urge incontinence do not indicate a single disease [8]. Instead they are a set of symptoms for various diseases, such as detrusor overactivity, detrusor hypersensitivity, infravesical obstruction, bladder neck insufficiency and polyuria, just to mention some [8]. Nevertheless the term OAB (syndrome) became popular in the urological field within the past 3–4 years [2], [3], [4], [5], [6], [7], [8].

It is generally accepted that OAB is a highly prevalent disorder that increases with age in both sexes and that has a profound impact on quality of life. Solid data on the prevalence of OAB in both sexes are scant. Three large-scale studies on the prevalence of OAB have recently been published [9], [10], [11]. Unfortunately, these three studies used individual definitions of OAB, none of which was entirely conform to the current ICS proposal [9], [10], [11]. As a result of this inconsistency, substantial differences on OAB prevalence rates have been reported [9], [10], [11].

To circumvent these shortcomings, we aimed to assess the prevalence of OAB in both sexes using the most recent 2002 ICS definition. Almost 2500 consecutive men and women with an age range of 20–91 years, participating in a health screening project in the area of Vienna, entered this analysis.

Section snippets

Study design

Voluntary health examinations free of charge are regularly organized in Vienna (approximately 1.6 million inhabitants; 47% men). Overall, there are seven sites at which the city's inhabitants can participate in a health survey; in addition, employees of large companies are also invited to participate. During this health examination the following parameters are routinely assessed: (1) a detailed medical history; (2) assessment of all concurrent medical therapies; (3) physical examination with

Study population

A total of 2418 individuals (1219 women/1199 men), aged 20–91 years, were enrolled in this study. The mean age of the female population was 49.5 ± 13.5 years (mean ± SD), that of the male population 48.5 ± 13.1 years (mean ± SD). The age distribution of the female population was as follows: 20–29 years: 5.4% (n = 66), 30–39 years: 14.1% (n = 172), 40–49 years: 31% (n = 378), 50–59 years: 25.8% (n = 315), 60–69 years: 12.7% (n = 155) and 70+ years: 10.9% (n = 133). In the male population, the respective percentages

Discussion

By using the 2002 ICS definition we obtained an overall prevalence of OAB in our population (20–91 years) of 10.2% in men and 16.8% in women. We have studied individuals participating in a health screening survey. One advantage of this approach is the fact that all participants underwent a health investigation. In contrast to mailed surveys or phone interviews, co-morbidities were assessed by a general practitioner. We were therefore able to exclude individuals with urinary tract infection as

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