Self-reported durations of typical priapism episodes in men with SCD. In those who participated (n = 163), the most typical durations of priapism were 3 to 4 hours (n = 35; 21.5%), 1 hour (n = 31; 19%), <0.5 hour (n = 30; 18.4%), >6 hours (n = 28; 17.2%), and 2 hours (n = 24; 14.7%), and the least reported duration was 5 to 6 hours (n = 15; 9.2%).