[Nosology, epidemiology, clinical quantification of erectile dysfunctions]

After a review of the literature and of our own data base this article specifies: the nosology of erectile dysfunction (ED) defined as an inability to achieve enough rigidity for a satisfactory intercourse. This lack of firmness is frequently associated with a loss of libido (37%), performance anxiety (37%), and premature ejaculation (40%). The prevalence of ED in the overall French population, age 18 to 70 years is 39% (11% presenting permanent ED defined as a rate of failure to perform of 50%). This rate increases with age to 52 and 25% respectively. A quantification of the symptomatology is proposed scoring three different aspects of sexual activity during intercourse, erectile activity in absence of intercourse, patient's satisfaction, and partner satisfaction. Figures of normal subjects and patients with ED are presented.