The main symptom is the inability to attain or maintain adequate erection to complete sexual activity.
As a result of this symptom, affected men may also experience depression and distress, and this symptom can cause interpersonal (including marital) issues.
Studies indicate that in the United States at least 30 million American men suffer from some degree of erectile dysfunction (ED). Of these, 10 to 20 million have a severe degree of ED resulting in the complete inability to attain or maintain a penile erection. The number of ED victims in the U.S. is projected to increase by nearly 10 million by the year 2025. With the advancement of men's median age in western industrial countries and the general population growth in developing nations, the worldwide incidence is projected to increase to greater than 320 million by 2025. ED accounts for more than 500,000 annual visits to health care professionals.
As with other chronic disorders and the conditions that are commonly associated with ED (diabetes, hypertension, cardiovascular disease), the prevalence of ED increases with advancing age, with an estimated prevalence of 39% in men aged 40 and 67% in those aged 70. These figures may actually underestimate the true dimensions of the problem since ED is notoriously under-reported, undiagnosed and under-treated because of the perceived stigma associated with the diagnosisof ED. It is reported that 70% of ED remains undiagnosed and in a survey of general medical practice less than 12% of men with ED reported having received treatment for it.
Ralph Myerson M.D., The Gale Group Inc., Gale, Detroit,