Lifestyle intervention, such as exercise and diet, may be effective treatment for ED.

The association of ED with cardiovascular risk factors may be a powerful motivator for men for whom diet and lifestyle changes are indicated.

Men who reported being physically active were much less likely to have ED compared to men who reported no daily physical activity. Similarly, men who reported being sedentary - measured by hours of daily television viewing and video and computer use - were much more likely to have ED, even after accounting for other risk factors.

This is the first study with national data on the prevalence of ED in the United States. ED varies by age, with 5 percent of men aged 20 to 40 having ED, to 70 percent of men 70 and older.

This is the first study with national data on the prevalence of ED in the United States.

We found exceptional, innovative approaches to ensuring rapid treatment of patients, ... We used management techniques and flow charts to define achievable times for each step.