The Authors performed urodynamic examinations on all patients affected by urinary incontinence. This examination enabled them to classify incontinence precisely, from the etiopathogenetic point of view. Incontinence may be due to an altered transmission of the abdominal pressure, to sphincteral lesions or insufficiency, or to stimuli. This classification provides clear indications for the choice of the most suitable therapy (surgical, medical, instrumental). It thereby contributes to improving the outcome and decreasing the number of relapses so far reported by all Authors using any of the suggested surgical techniques.