Fig. 1. Comparison of age-adjusted prevalence of self-reported erectile dysfunction (self-ED) and International Index of Erectile Function-5-assessed erectile dysfunction (IIEF-5-ED) between the 2006 and 2016 studies. (A) Age-adjusted prevalence of self-ED between 2006 and 2016. (B) Age-adjusted prevalence of IIEF-5-ED between 2006 and 2016. aFor comparison with the 2006 study, the age-adjusted overall prevalence was calculated excluding the 60s age group.