“…Reasons for non-completion include clients' poor motivation, low expectations of treatment success, heavier substance use on treatment entry, limited attachment to the programme ideology, lack of identification with other residents or staff, as well as insufficient counselling (Darke, Campbell & Popple, 2012;Goethals et al, 2015;Joe, Simpson & Broome, 1998;Keen et al, 2001;Ravndal & Vaglum, 1994). In contrast, factors that have been associated with good TC retention include clients' social conformity, successful detoxification prior to treatment, previous episodes of successful treatment, being inducted into the TC, and the existence of strong therapeutic alliances between staff and residents (Darke, Campbell & Popple, 2012;Harrison et al, 2007;Keen et al, 2001;Lang & Belenko, 2000).…”