Figure 5: Sensory threshold in PE without OPPD and PE with OPPD group. Sensory threshold of (a) warm, (b) cold, and (c) vibration in each location. The dot indicates the median and the whiskers indicate lower and upper quartile. No significant difference between PE without OPPD and PE with OPPD group (Wilcoxon rank-sum test). PE: premature ejaculation; OPPD: orgasmic pleasure perceptual dysfunction.