• In Western Australia (WA) in 2004-05, 340 government-funded alcohol and other drug treatment agencies provided 16,092 'closed treatment episodes'.
  • One-third (33%) of closed treatment episodes were for clients aged 20-29 years, and more than one-quarter (27%) were for clients aged 30-39 years.
  • Male clients accounted for 62% of all closed treatment episodes.
  • Alcohol (33%) and amphetamines (26%) were the most common principal drugs of concern in closed treatment episodes, followed by cannabis (19%) and opioids (15%, with heroin accounting for 12%).
  • Of all closed treatment episodes, counselling was the most common main treatment provided (55%), followed by rehabilitation (12%) and withdrawal management (detoxification) (9%).
  • Treatment episodes most commonly ceased because the treatment was completed (43%).