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The aim of this study was to develop a screening test based on the Leiden Impotence Questionnaire (LIQ) in order to assist in the difficult process of differentiating between psychogenic and organic erectile dysfunction (ED). The main sample consisted of 176 patients with ED, which was classified according to the results of the urological and psychiatric assessment as either organic, in 109 (62%) patients, or psychogenic, in 67 (38%) patients. A logistic regression model including six general items from the LIQ correctly identified psychogenic ED in 62% of the cases, and organic ED in 86%, with an overall correct classification rate of 76%. Adding information regarding sexual intercourse and the relationship in patients who had a partner and were having sexual intercourse the correct classification rates were: psychogenic 77%, organic 94%, and overall 87%. Discrimination between psychogenic and organic ED is improved when more information concerning sexual activity can be assessed. © 1993.

Original publication




Journal article


Journal of Psychosomatic Research

Publication Date





135 - 145