title: [Investigation on emerging rate and prevalence of male homosexuality in Hangzhou City].
abstract: OBJECTIVE
  To understand prevalence of male homosexuality in Hangzhou, Zhejiang Provicne of China.
  
  
  METHODS
  To investigate emerging rate of male homosexuality and infer its prevalence in public gathering by observation at fixed points and questionnaire survey in gay men.
  
  
  RESULTS
  There were 2 012.5 male homosexuals taking part in public gatherings, with 95% confidence interval of 1 899 - 2 129, in Hangzhou. Frequency of such activities they took part in was once every 3 - 15 days (11.3 +/- 2.7) days. Each gay man knew 1.51 +/- 0.33 (0 - 6) other male homosexuals who never exposed their sexual orientation. The emerging number of male homosexuals was 5 051.38.
  
  
  CONCLUSIONS
  The emerging rate of male homosexuality was 0.58%, with its prevalence of about 1% - 2% in public gatherings in Hangzhou.
authors.affiliation: Department of Psychiatry, the First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou 310003, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xu
authors.forename: Wei-Xing
authors.initials: WX
authors.lastname: Shi
authors.forename: Shao-Hua
authors.initials: SH
authors.lastname: Hu
authors.forename: Er-Qing
authors.initials: EQ
authors.lastname: Wei
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D015658:HIV Infections / Q000517:prevention & control* / Q000635:transmission; D006716:Homosexuality / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012725:Sexual Behavior; D012747:Sexual Partners / Q000523:psychology; D011795:Surveys and Questionnaires