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- Title
Evaluating the impact of community-based treatment options on methamphetamine use: findings from the Methamphetamine Treatment Evaluation Study ( MATES)
- Authors
McKetin, Rebecca; Najman, Jake M.; Baker, Amanda L.; Lubman, Dan I.; Dawe, Sharon; Ali, Robert; Lee, Nicole K.; Mattick, Richard P.; Mamun, Abdullah
- Abstract
Aims To evaluate the impact of community-based drug treatment on methamphetamine use using inverse probability of treatment-weighted ( IPTW) estimators to derive treatment effects. Design A longitudinal prospective cohort study with follow-ups at 3 months, 1 year and 3 years. Treatment effects were derived by comparing groups at follow-up. IPTW estimators were used to adjust for pre-treatment differences between groups. Setting Sydney and Brisbane, Australia. Participants Participants were methamphetamine users entering community-based detoxification ( n = 112) or residential rehabilitation ( n = 248) services and a quasi-control group of methamphetamine users ( n = 101) recruited from the community. Measurements Frequency of methamphetamine use between interviews (no use, less than weekly, 1-2 days per week, 3+ days per week), continuous abstinence from methamphetamine use, past month methamphetamine use and methamphetamine dependence. Findings Detoxification did not reduce methamphetamine use at any follow-up relative to the quasi-control group. Relative to quasi-control and detoxification groups combined, residential rehabilitation produced large reductions in the frequency of methamphetamine use at 3 months [odds ratio ( OR) = 0.23, 95% confidence interval ( CI) 0.15-0.36, P < 0.001), with a marked attenuation of this effect at 1 year ( OR 0.62, 95% CI 0.40-0.97, P = 0.038) and 3 years ( OR = 0.71, 95% CI 0.42-1.19, P = 0.189). The greatest impact was for abstinence: for every 100 residential rehabilitation clients there was a gain of 33 being continuously abstinent at 3 months, with this falling to 14 at 1 year and 6 at 3 years. Conclusions Community-based residential rehabilitation may produce a time-limited decrease in methamphetamine use, while detoxification alone does not appear to do so.
- Publication
Addiction, 2012, Vol 107, Issue 11, p1998
- ISSN
0965-2140
- Publication type
Journal Article
- DOI
10.1111/j.1360-0443.2012.03933.x