This page is being served from the Urological Sciences Research Foundation web repository, and was originally posted between 1996-2008. In January 2009 USRF’s founder, Dr. Leonard S. Marks and his staff joined UCLA’s Department of Urology where they are continuing their research. Click for more information.

Figure 1. Relationship between total IIEF, denoted as % of maximum score (75) (vertical axis) and Severity Class (horizontal axis) is shown for the 74 men at baseline.

I=satisfactory penetration possible, n=14; II=marginal penetration possible, n=30; III=partial erections/no penetration, n=19; IV=no erections, n=11.