Duration of Erection: Does It Really Matter? A Randomized, Double‐Blind Clinical Trial to Assess the Impact of Vardenafil ODT on Duration of Erection and Its Correlation with Patients' and Partners' Sexual Quality of Life and Duration of Intercourse: Th

This study provides further evidence for the consistency and reliability of the stopwatch‐assessed duration of erection as an efficacy end point for ED treatments, with “duration of erection leading to successful intercourse” showing better properties than duration at any attempt. Martin‐Morales A, Gutiérrez‐Hernández P, Romero‐Otero J, and Romero‐Martín JA. Duration of erection: Does it really matter? A randomized, double‐blind clinical trial to assess the impact of vardenafil ODT on duration of erection and its correlation with patients' and partners' sexual quality of life and duration of intercourse: The VADEOPEN study. J Sex Med 2014;11:1527-1538.