Which statement is TRUE regarding impotence?

The statement about impotence being commonly caused by vascular disease is accurate because a substantial number of cases are linked to blood flow issues. The vascular system plays a crucial role in the ability to achieve and maintain an erection; if blood vessels are narrowed or damaged—due to conditions like atherosclerosis or diabetes—it can lead to erectile dysfunction. Understanding that vascular disease is a key contributor helps in identifying potential treatment paths, such as addressing underlying cardiovascular issues or considering vascular surgery.

In contrast, the other statements do not hold true because they misrepresent the complexity of impotence. For example, penile pressure measurements after treadmill testing are not a typical measure for diagnosing erectile dysfunction, making the first statement misleading. The assertion that only psychological factors cause impotence is an oversimplification, as impotence can also arise from physical factors, including hormonal issues and nerve damage. Finally, the notion that all causes of impotence are surgical disregards the wide range of non-surgical treatments available, such as oral medications, lifestyle changes, and psychotherapy. Thus, acknowledging vascular disease as a common cause provides important insight into the multifaceted nature of impotence.