title: The North American Opiate Medication Initiative (NAOMI): profile of participants in North America's first trial of heroin-assisted treatment.
abstract: The North American Opiate Medication Initiative (NAOMI) is a randomized controlled trial evaluating the feasibility and effectiveness of heroin-assisted treatment (HAT) in the Canadian context. Our objective is to analyze the profile of the NAOMI participant cohort in the context of illicit opioid use in Canada and to evaluate its comparability with patient profiles of European HAT studies. Recruitment began in February 2005 and ended in March 2007. Inclusion criteria included opioid dependence, 5 or more years of opioid use, regular opioid injection, and at least two previous opiate addiction treatment attempts. Standardized assessment instruments such as the European Addiction Severity Index and the Maudsley Addiction Profile were employed. A total of 251 individuals were randomized from Vancouver, BC (192, 76.5%), and Montreal, Quebec (59, 23.5%); 38.5% were female, the mean age was 39.7 years (SD:8.6), and participants had injected drugs for 16.5 years (SD:9.9), on average. In the prior month, heroin was used a mean of 26.5 days (SD:7.4) and cocaine 16 days (SD;12.6). Vancouver had significantly more patients residing in unstable housing (88.5 vs. 22%; p < 0.001) and higher use of smoked crack cocaine (16.9 days vs. 2.3 days in the prior month; p < 0.001), while a significantly higher proportion of Montreal participants reported needle sharing in the prior 6 months (25% vs. 3.7%; p < 0.001). In many respects, the patient cohort was similar to the European trials; however, NAOMI had a higher proportion of female participants and participants residing in unstable housing. This study suggests that the NAOMI study successfully recruited participants with a profile indicated for HAT. It also raises concern about the high levels of crack cocaine use and social marginalization.
authors.affiliation: School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada. eugenia@mail.cheos.ubc.ca
authors.forename: Eugenia
authors.initials: E
authors.lastname: Oviedo-Joekes
authors.forename: Bohdan
authors.initials: B
authors.lastname: Nosyk
authors.forename: Suzanne
authors.initials: S
authors.lastname: Brissette
authors.forename: Jill
authors.initials: J
authors.lastname: Chettiar
authors.forename: Pascal
authors.initials: P
authors.lastname: Schneeberger
authors.forename: David C
authors.initials: DC
authors.lastname: Marsh
authors.forename: Michael
authors.initials: M
authors.lastname: Krausz
authors.forename: Aslam
authors.initials: A
authors.lastname: Anis
authors.forename: Martin T
authors.initials: MT
authors.lastname: Schechter