title: Asexuality development among middle aged and older men.
abstract: OBJECTIVE
  To assess erectile function in middle-aged and older men with asexuality status and further analyze their specific reasons for this condition.
  
  
  METHODS
  Men who had regular sexual intercourse attempts (sex frequency ≥ 1 time per month) were classified into mild erectile dysfunction (ED), moderate to severe ED and non-ED according to International Index of Erectile Function-5, and men having no sexual intercourse attempts for at least 6 months were defined as having an asexuality status. The risk factors associated with ED were collected in a sample of 1,531 Chinese men aged 40 to 80 years, and the self-report reasons for asexuality were recorded in asexual cohort individually. Comparative analyses and multivariate regression models were conducted among these groups.
  
  
  RESULTS
  The prevalence rates of ED and asexuality status were 49.9% and 37.2%. The asexuality status group had higher risk factors than the moderate to severe ED group in terms of old age (age ≥ 65, adjusted odds ratio (OR) 17.69 versus (Vs.) 7.19), diabetes (crude OR: 2.40 Vs. 2.36) and hypertension (crude OR: 1.78 Vs. 1.72). The specific reasons for the asexuality status were "erectile difficulty" (52.9%), "do not care about sexuality" (53.5%)", "no longer necessary to have sexuality at this age" (47.7%), "severe stress" (44.4%), "severe fatigue" (26.3%) and "masturbation" (26.9%).
  
  
  CONCLUSIONS
  Men with an asexual status suffer from higher risk factors for ED than men with moderate to severe ED. The majority of this asexual status could be attributed to a full ED, although the reasons for this transient asexuality also involved sexual attitudes and interests, sexual partners and masturbation.
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Huang
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Ping
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Hong-Xiang
authors.initials: HX
authors.lastname: Wang
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Hu
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Yang
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Tan
authors.initials: T
authors.lastname: Feng
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Yin-Fa
authors.initials: YF
authors.lastname: Han
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Yi-Xin
authors.initials: YX
authors.lastname: Wang
authors.affiliation: Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Andrology, Shanghai, China.
authors.forename: Yi-Ran
authors.initials: YR
authors.lastname: Huang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003920:Diabetes Mellitus / Q000453:epidemiology / Q000503:physiopathology / Q000523:psychology; D007172:Erectile Dysfunction / Q000453:epidemiology / Q000503:physiopathology* / Q000523:psychology; D006801:Humans; D006973:Hypertension / Q000453:epidemiology / Q000503:physiopathology / Q000523:psychology; D008297:Male; D008875:Middle Aged