"Most of the clients (6,754) report opioids as their primary drug, followed at a great distance by cannabis (243) and cocaine (93) (data for 57 of the 61 structures). Injecting use prior to admission was reported by 4,192 clients in treatment in the reporting year (data for 55 of the 61 structures). Out of “all clients”, 2,400 (32.3%) are aged over 40 (data for 59 of the 61 structures).
"With regard to treatment outcome, 55 of the 61 structures reported the relevant data. More specifically, 4,039 clients (62.9%) continued in treatment until the end of 2010. As for the modes of exit from treatment programmes, 2,385 clients (37.1%) withdrew from the programmes while the prevailing modes are premature discharge (38.2%), dropout (28.9%), treatment completion (24.4%) and referral to another unit or service (5.3%)."


University Mental Health Research Institute, "2011 National Report (2010 Data) to the EMCDDA by the Reitox National Focal Point: Greece: New Development, Trends and in-depth information on selected issues" (Lisbon, Portugal: EMCDDA, 2011), p. 48.