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Statistics from the National Drug Treatment Monitoring System (NDTMS) 1 April 2010, 31 March 2011

received at least one Tier 3 or Tier 4 treatment modality as part of their treatment episode. − A total of 293,325 episodes of treatment were recorded for these clients and 370,854 treatment modalities/interventions were recorded as having been provided. − Clients' median age (on 30 th September 2006, the midpoint of the year) was 31 years and 72% were male. Regions exhibited variation with respect to the proportion of clients aged less than 25 years (from 18% to 29% of clients). − Most (88%) clients were White. Other ethnic groups each accounted for fewer than three percent of clients. − Most clients (65%) used heroin, usually as their primary drug (61% of clients). − Primary cannabis use was common, particularly among clients aged less than 18 years at triage (75% of this group were primary cannabis users, compared to only seven percent of over eighteens). − Adjunctive use of crack cocaine was common. Primary use was unusual, except in London where primary crack users accounted for 15% of clients. − The most common routes into treatment were via self (34%), criminal justice (24%), or GP (11%) referral, − Nearly one half (44%) of episodes that were completed during the year ended in a successful discharge from treatment. For clients aged 20 years or more in the reporting year, the rate of successful discharge increased gradually and consistently with age. − Three quarters (75%) of the treatment journeys that commenced during the year lasted twelve weeks or more.