1. Antiretroviral treatment outcomes among foreign-born and aboriginal peoples living with HIV/AIDS in northern Alberta
- Author
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Lefebvre, Megan E., Hughes, Christine A., Yasui, Yutaka, Saunders, L. Duncan, and Houston, Stan
- Subjects
Antiviral agents -- Dosage and administration -- Patient outcomes ,Indigenous peoples -- Drug therapy ,HIV patients -- Drug therapy ,Aliens -- Drug therapy ,Government ,Health ,Health care industry - Abstract
OBJECTIVE: The HIV/AIDS epidemic disproportionately involves socially vulnerable populations. Since 2001, the proportion of foreign-born patients served by the Northern Alberta HIV Program has increased. Our study aimed to evaluate antiretroviral therapy (ART) outcomes among HIV-infected foreign-born patients in northern Alberta, Canada, prescribed once-daily ART. METHODS: We utilized a two-part retrospective cohort study to compare ART outcomes of foreign-born and Canadian-born Aboriginal patients compared to Canadian-born non-Aboriginal patients. Part 1 utilized logistic regression to compare the odds of experiencing initial virological suppression of foreign-born (40%) and Canadian-born Aboriginal patients (27%) compared with Canadian-born non-Aboriginal patients (33%). Part 2 used survival analysis to compare the rate of ART failure by country of origin among patients who achieved initial virological suppression in Part 1. RESULTS: Our study sample included 322 treatment-naive patients (122 foreign-born). For Part 1, 261 patients achieved initial virological suppression within six months of initiating ART. After controlling for age, treatment regimen, HIV risk exposure, and calendar year compared to Canadian-born non-Aboriginal patients, the odds of achieving initial virological suppression were significantly lower for Canadian-born Aboriginal patients (OR=0.44, 95% CI: 0.20-0.96); and similar for foreign-born patients (OR=0.76, 95% CI: 0.33-1.73). Part 2 included 261 patients who were followed for 635.1 person-years. Adjusting for age, sex, baseline CD4 cell count, and drug regimen, compared to Canadian-born non-Aboriginal patients, Canadian-born Aboriginal and foreign-born patients had similar rates of virological failure after achieving initial virological suppression (HR=1.54, 95% CI: 0.38-6.18; HR=0.49, 95% CI: 0.11-2.20, respectively). CONCLUSIONS: Our study indicated that ART outcomes among Alberta-based foreign-born patients are similar to those among Canadian-born non-Aboriginal patients. Our results, however, suggested that Canadian-born Aboriginal patients had poorer treatment outcomes compared to Canadian-born non-Aboriginal patients. It is imperative, therefore, that clinicians, researchers and community members better understand reasons for poor ART outcomes among Canadian-born Aboriginal patients in northern Alberta. KEY WORDS: Antiretroviral therapy; emigrants and immigrants; HIV-1; treatment outcomes; Canada OBJECTIF: L'epidemie de VIH et de sida frappe demesurement les populations socialement vulnerables. Depuis 2001, la proportion de patients nes a l'etranger servis par le programme de lutte contre le VIH du nord de l'Alberta a augmente. Notre etude visait a evaluer les effets de la therapie antiretrovirale (TAR) dans le nord de l'Alberta, au Canada, chez des patients infectes par le VIH nes a l'etranger auxquels on avait prescrit une dose quotidienne d'antiretroviraux. METHODE: Nous avons utilise une etude de cohorte retrospective en deux volets pour comparer les effets de la TAR chez les patients nes a l'etranger et les patients autochtones nes au Canada et chez les patients non autochtones nes au Canada. Le 1er volet a fait appel a la regression logistique pour comparer la probabilite d'une suppression virale initiale chez les patients nes a l'etranger (40%) et les patients autochtones nes au Canada (27%) et chez les patients non autochtones nes au Canada (33%). Le 2e volet a fait appel a l'analyse de survie pour comparer le taux d'echec de la TAR selon le pays d'origine des patients ayant obtenu une suppression virale initiale durant le 1er volet. RESULTATS: Notre echantillon d'etude comportait 322 patients naifs de traitement (dont 122 nes a l'etranger). Pour le 1er volet, 261 patients ont obtenu une suppression virale initiale moins de six mois apres le debut de la TAR. Compte tenu de l'age, du schema therapeutique, du risque d'exposition au VIH et de l'annee civile, comparativement aux patients non autochtones nes au Canada, la probabilite d'obtenir une suppression virale initiale etait significativement plus faible chez les patients autochtones nes au Canada (RC=0,44, IC de 95%: 0,20-0,96); et similaire a celle des patients nes a l'etranger (RC=0,76, IC de 95%: 0,33-1,73). Le 2e volet incluait 261 patients, suivis sur 635,1 annees-personne. Compte tenu de l'age, du sexe, de la numeration des lymphocytes CD4 au depart et du regime posologique, comparativement aux patients non autochtones nes au Canada, les patients autochtones nes au Canada et les patients nes a l'etranger avaient des taux d'echec virologique similaires apres la suppression virale initiale (indice de risque (IR)=1,54, IC de 95%: 0,38-6,18; IR=0,49, IC de 95%: 0,11-2,20, respectivement). CONCLUSIONS: Notre etude indique que les effets de la TAR chez les patients de l'Alberta nes a l'etranger sont semblables a ceux observes chez les patients non autochtones nes au Canada. Par contre, nos resultats donnent a penser que chez les patients autochtones nes au Canada, les effets du traitement sont moins bons que chez les patients non autochtones nes au Canada. Il est donc imperatif que les cliniciens, les chercheurs et le public comprennent mieux les raisons de l'inefficacite relative de la TAR chez les patients autochtones du nord de l'Alberta nes au Canada. MOTS CLES: therapie antiretrovirale; emigrants et immigrants; VIH-1; effets physiologiques des medicaments; Canada, The HIV/AIDS epidemic disproportionately impacts vulnerable populations. In 2012, persons born in HIV-endemic countries comprised approximately 2.2% of the Canadian population but accounted for 13% of newly diagnosed HIV cases. [...]
- Published
- 2014