title: Changes of sexual function and perception in Japanese men: A 15-year cross-sectional community-based study.
abstract: To investigate the longitudinal changes of sexual function of Japanese men.
  
  
  
  From 1992 to 1993, we carried out a cross-sectional community-based study on sexual function in Japanese men aged 40-79 years. After 15 years, a follow-up study was carried out to determine longitudinal changes of their sexual function. Of the 319 participants in the initial study, 135 participated again in the follow-up study. Sexual function was assessed using the same validated questionnaire in the two studies.
  
  
  
  Erectile rigidity declined in men of each age decade at baseline (40s, 50s, 60s and 70s) of the initial study (P < 0.01, <0.01, <0.01 and <0.05). The frequency of sexual drive was significantly decreased in men aged in their 40s, 50s and 60s (P < 0.05, <0.01 and <0.01). Men aged in their 40s were dissatisfied with their decreased sexual function (P < 0.05). In contrast, men aged in their 70s were satisfied with their sexual life (P < 0.01).
  
  
  
  Over a 15-year period, the sexual function of Japanese men declined in each age decade. However, the perception of this decline differed among different age group. Most elderly Japanese men did not worry about their impaired sexual function.
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. aktakaya@sapmed.ac.jp.
authors: Akio
authors: A
authors: Takayanagi
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Ko
authors: K
authors: Kobayashi
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Fumimasa
authors: F
authors: Fukuta
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Masahiro
authors: M
authors: Matsuki
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Yohei
authors: Y
authors: Matsuda
authors: Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Mitsuru
authors: M
authors: Mori
authors: Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
authors: Naoya
authors: N
authors: Masumori
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D003430:Cross-Sectional Studies; D007172:Erectile Dysfunction; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010410:Penile Erection; D012725:Sexual Behavior; D011795:Surveys and Questionnaires
keywords: Japanese male; community-based study; longitudinal change; sexual function; sexual satisfaction