Final answer:
Older adults are disproportionately affected by erectile dysfunction, with prevalence increasing with age and reaching nearly 70 percent by age 70. Various health conditions and medication use can also contribute to ED, making it more common in this age group.
Step-by-step explanation:
The main answer to the question of which group among American men is disproportionately affected by erectile dysfunction (ED) is older adults. Erectile dysfunction is a condition where there is difficulty either initiating or maintaining an erection. The prevalence of this condition increases with age, affecting approximately 40 percent of men at the age of 40, reaching nearly 70 percent by the age of 70. Other factors such as diabetes, vascular disease, psychiatric disorders, and certain medications can also contribute to erectile dysfunction.In conclusion, while erectile dysfunction can affect men at any age, it disproportionately affects older adults, likely due to a combination of age-related physiological changes and the increased likelihood of having health conditions that contribute to ED.