Which Happens Earlier, Lower Urinary Tract Symptoms or Erectile Dysfunction?

Abstract Introduction Although an association between erectile dysfunction (ED) and lower urinary tract symptoms (LUTS) has been suggested, it was not clarified whether LUTS developed before ED or vice versa. Aim To clarify whether LUTS develop before ED or vice versa and which symptoms predicted the onset of the other condition in a longitudinal community-based study. Methods We conducted a longitudinal community-based study on LUTS and ED in aged Japanese men. A follow-up study was conducted to determine their longitudinal changes of LUTS and ED after 15 years. Erectile function was evaluated using a validated questionnaire. LUTS were evaluated based on the International Prostate Symptom Score, quality of life index, and prostate volume. Main outcome measure We evaluated the baseline symptoms among the participants who had LUTS and ED in the follow-up survey and what prior symptoms could predict the onset of the other condition using the data from a long-term longitudinal survey. Results A total of 108 men were enrolled in this study. Of the 47 men having both LUTS and ED in the follow-up study, men having only LUTS (n = 16) were more frequent than those having only ED (n = 6) in the initial study. Likewise, of the 38 men having both nocturia and ED at the time of the follow-up study, those having only nocturia (n = 12) were more frequent than those having only ED (n = 5) in the initial study. In multivariable analysis, age 60 years or older (odds ratio: 7.10, 95% CI: 2.09-24.13) and nocturia (odds ratio: 15.83, 95% CI: 3.05-82.15) were independent predictors for the onset of ED. Conclusion There were more men with prior onset of LUTS, especially nocturia, than men with prior onset of ED among those with both ED and LUTS in this long-term longitudinal study. Nocturia may be a predictor of subsequent ED. Matsuda Y, Kobayashi K, Fukuta F, et al. Which Happens Earlier, Lower Urinary Tract Symptoms or Erectile Dysfunction?. J Sex Med 2020;XX:XXX–XXX.