Effectiveness

"The overriding finding from this study is that treatment is associated with a reduction in harmful behaviours that are associated with problem drug use. The majority of treatment seekers received care-coordinated treatment, expressed satisfaction with their care, were retained in treatment beyond three months, reported significant and substantial reductions in drug use and offending, and improvements in mental well-being and social functioning."

Source

Andrew Jones, et al., "Research Report 24: The Drug Treatment Outcomes Research Study (DTORS): Final Outcomes Report" (London, England: UK Government, Home Office Ministry, Research, Development & Statistics Directorate, December 2009), p. 14.
http://socialwelfare.bl.uk/su…
http://socialwelfare.bl.uk/su…