Four hundred six patients with a complaint of erectile dysfunction were evaluated in a urology department based Male Sexual Dysfunction Center. Results of physical examination, medical and psychosexual history, nocturnal penile tumescence (NPT), penile blood pressure, visual sexual stimulation, hormonal screen, and partner interview were used in establishing the final diagnosis. A summary of the final diagnoses is as follows: organic impotence 117 (28.8 %), psychogenic impotence 161 (39.7%), combined factors 102 (25.1 %), and dysfunction of unknown origin 26 (6.4 %). Data analysis confirms that to establish a diagnosis of organic erectile failure multiple objective measurements in combination with patient and partner history are necessary.
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