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Canadian Journal of Public Health

, Volume 91, Issue 5, pp 345–349 | Cite as

Risk Behaviours and HIV Infection Among Men Having Sexual Relations with Men: Baseline Characteristics of Participants in the Omega Cohort Study, Montreal, Quebec, Canada

  • Annie Dufour
  • Michel AlaryEmail author
  • Joanne Otis
  • Robert S. Remis
  • Benoît Mâsse
  • Bruno Turmel
  • Jean Vincelette
  • Raymond Parent
  • René Lavoie
  • Roger LeClerc
  • Omega Study Group
Article

Abstract

Objective: To describe characteristics of men having sex with men (MSM) participating in the Omega Cohort, to describe HIV-positive participants at baseline interview, and to estimate HIV incidence.

Methods: The Omega Cohort is a study on the incidence and psychosocial determinants of HIV infection among MSM living in Montreal. MSM complete a questionnaire and are tested for HIV every six months.

Results: During the previous six months, 31% and 12% of 810 participants (mean age=33 years) reported unprotected anal sex with regular and casual partners, respectively. Eight participants (0.98%) were HIV-infected at baseline. HIV incidence was 0.89 per 100 person-years (7/787 person-years) [95% confidence interval: 0.36–1.83].

Conclusion: A significant proportion of participants reported current risk behaviours. Despite this, HIV incidence is relatively low. It is important to target MSM who do not practice safe sex and to encourage those practicing safe sex to sustain these behaviours.

Résumé

Objectif: Décrire les caractéristiques des hommes ayant des relations sexuelles avec d’autres hommes (HRSH) participant à la Cohorte Omega, caractériser les participants séropositifs à l’entrée dans l’étude, et estimer l’incidence du VIH sur des données préliminaires.

Méthode: La Cohorte Omega porte sur l’incidence et les déterminants psychosociaux de l’infection par le VIH chez les HRSH habitant Montréal. Les participants complètent un questionnaire et sont testés pour le VIH à tous les six mois.

Résultats: Lors des six derniers mois, 31 % et 12 % des 810 participants (âge moyen=33 ans) ont eu des relations anales non protégées avec des partenaires réguliers et occasionnels, respectivement. Huit participants (0,98 %) étaient infectés par le VIH à l’entrée dans l’étude. L’incidence du VIH était de 0,89 par 100 personne-années (7/787 personne-années) [intervalle de confiance à 95 %: 0,36–1,83].

Conclusion: Certains participants de la Cohorte Omega ont couramment des comportements à risque d’infection par le VIH. Malgré cette observation, l’incidence du VIH est relativement peu élevée. Il est primordial de cibler les HRSH qui pratiquent des comportements à risque et d’encourager ceux qui pratiquent déjà des comportements sexuels sécuritaires à continuer ainsi.

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Copyright information

© The Canadian Public Health Association 2000

Authors and Affiliations

  • Annie Dufour
    • 1
  • Michel Alary
    • 1
    • 2
    Email author
  • Joanne Otis
    • 3
  • Robert S. Remis
    • 4
    • 5
  • Benoît Mâsse
    • 1
  • Bruno Turmel
    • 5
  • Jean Vincelette
    • 6
  • Raymond Parent
    • 2
  • René Lavoie
    • 7
  • Roger LeClerc
    • 8
  • Omega Study Group
  1. 1.Groupe de recherche en épidémiologic, Centre hospitalier affilié universitaire de QuébecHôpital du St-Sacrement du CHAQuébecCanada
  2. 2.Centre de santé publique de QuébecBeauportCanada
  3. 3.Département de SexologieUniversité du Québec à MontréalMontréalCanada
  4. 4.Department of Public Health SciencesUniversity of TorontoTorontoCanada
  5. 5.Direction de la santé publique de Montréal-CentreMontréalCanada
  6. 6.Service de Microbiologie, Centre Hospitalier de l’Université de MontréalHôpital Saint-LucMontréalCanada
  7. 7.Action Séro-ZéroMontréalCanada
  8. 8.COCQ-SidaMontréalCanada

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