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Eur Urol. 2003 Nov;44(5):588-94.

Lower urinary tract symptoms and erectile dysfunction: co-morbidity or typical "Aging Male" symptoms? Results of the "Cologne Male Survey".

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  • 1Department of Urology, University of Cologne, Joseph-Stelzmann-Str. 9, 50924 Köln, Germany. moritz.braun@medizin.uni-koeln.de



Due to demographic developments in industrial nations, age-correlated diseases are becoming more important. From many epidemiological studies we know that the prevalence of benign prostatic hyperplasia (BPH) and the loss of erectile function (= erectile dysfunction or ED) increase with advancing age. Are these two illnesses related or/and independent?


We mailed our newly developed and validated questionnaire on male erectile dysfunction (KEED), as well as a set of questions pertaining to voiding problems (IPSS), to a representative population sample of 8000 men from 30 to 80 years of age residing in the city of Cologne.


The responses included 4489 evaluable replies (56.1%). The response rates in the different age groups ranged from 41 to 61%. The mean age of the men who answered was 51.8 years. The overall prevalence of ED was 19.2% (n=862), with a steep age-related increase from 2 to 53%. Furthermore, 31.2% (n=1957) of all men complained of lower urinary tract symptoms (LUTS), the prevalence and the intensity of which increased with age. Interestingly, a high co-morbidity was found between ED and voiding problems. Prevalence of LUTS in men suffering from ED was about 72.2% (n=621) vs. 37.7% (1367) in men with normal erections. The odds ratio was evaluated with 2.11. The trivariate analysis showed that the occurrence of LUTS can be considered as an age-independent risk factor for the development of ED (p<0.001).


Even though the pathogenetic relationship between LUTS and ED is not yet completely understood, one has to postulate a direct association between these two typical symptom complexes in the aging male.

[PubMed - indexed for MEDLINE]
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