Journal
ADDICTION
Volume 113, Issue 4, Pages 656-667Publisher
WILEY
DOI: 10.1111/add.14059
Keywords
Crime; methadone; methadone maintenance treatment; MMT; offenders; substitution treatment
Categories
Funding
- British Columbia Inter-Ministry Research Initiative (IMRI)
- Canadian Institutes of Health Research [GSD-14620, 2009 s0231]
- British Columbia Ministry of Justice [2014 s0040]
- Health Canada [2009s0231]
Ask authors/readers for more resources
Aims To estimate and test the difference in rates of violent and non-violent crime during medicated and non-medicated methadone treatment episodes. Design, Setting and Participants The study involved linkage of population level administrative data (health and justice) for all individuals (n = 14 530) in British Columbia, Canada with a history of conviction and who filled a methadone prescription between 1 January 1998 and 31 March 2015. Methadone maintenance treatment was the primary independent variable and was treated as a time-varying exposure. Each participant's follow-up (mean: 8 years) was divided into medicated (methadone was dispensed) and non-medicated (methadone was not dispensed) periods with mean durations of 3.3 and 4.6 years, respectively. Measurements Socio-demographics of participants were examined along with the main outcomes of violent and non-violent offences. Findings During the first 2 years of treatment (<= 2.0 years), periods in which methadone was dispensed were associated with a 33% lower rate of violent crime [0.67 adjusted hazard ratio (AHR), 95% confidence intervals (CI) = 0.59, 0.76] and a 35% lower rate of nonviolent crime (0.65 AHR, 95% CI = 0.62, 0.69) compared with non-medicated periods. This equates to a risk difference of 3.6 (95% CI = 2.6, 4.4) and 37.2 (95% CI = 33.0, 40.4) fewer violent and non-violent offences per 100 person-years, respectively. Significant but smaller protective effects of dispensed methadone were observed across longer treatment intervals (2.0 to <= 5.0 years, 5.0 to <= 10.0 years). Conclusions Among a cohort of Canadian offenders, rates of violent and non-violent offending were lower during periods when individuals were dispensed methadone compared with periods in which they were not dispensed methadone.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available