title: Correlates of hepatitis B vaccination in a high-risk population: an Internet sample.
abstract: OBJECTIVE
  We sought to identify factors associated with hepatitis B virus vaccination, including knowledge and attitudes about hepatitis vaccination, and sexual and nonsexual risk behaviors among at-risk homosexual and bisexual men.
  
  
  METHODS
  Internet electronic communications were used to collect data from homosexual and bisexual men from the United States, using a 31-item online questionnaire accessible for 1 month.
  
  
  RESULTS
  The mean (+/- SD) age of the 336 respondents was 38 +/- 11 years. Nearly 42% (142) reported at least one dose of vaccine; the remainder were completely unvaccinated. About 21% (n = 71) reported having no information about hepatitis. Approximately 72% (242) of respondents reported never using condoms during oral intercourse, and 26% (n = 87) reported using condoms during less than half of their episodes of anal intercourse. In multivariate analysis, variables associated with vaccination were younger age (odds ratio [OR] 0.7 per 10-year increase in age; 95% confidence interval [CI] 0.59 to 0.84, P = 0.002), high level of knowledge about the vaccine (OR 1.4; 95% CI: 1.03 to 1.83, P = 0.007), communication with a health-care provider about hepatitis (OR 1.98; 95% CI 1.31 to 2.98, P = 0.006), and professional training that included hepatitis education (OR 2.77; 95% CI 1.7 to 4.5, P = 0.001).
  
  
  CONCLUSIONS
  Our findings underscore the need for health care providers to emphasize vaccine efficacy and safety, and to encourage high-risk patients to receive vaccination, particularly among men at high risk based on sexual and drug use behaviors.
authors.affiliation: Department of Health Behavior, School of Public Health, University of Alabama, Birmingham, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Rhodes
authors.forename: R J
authors.initials: RJ
authors.lastname: DiClemente
authors.forename: L J
authors.initials: LJ
authors.lastname: Yee
authors.forename: K C
authors.initials: KC
authors.lastname: Hergenrather
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001727:Bisexuality; D007722:Health Knowledge, Attitudes, Practice; D006509:Hepatitis B / Q000517:prevention & control*; D018451:Homosexuality, Male; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D014611:Vaccination