Psychosocial groups within the AOD treatment setting are also much appreciated by clients with comorbid conditions [421]. Evidence suggests that clients who attend groups consistently and for a longer time period achieve the best results (e.g., for a year), although positive outcomes can nonetheless be achieved by attending shorter-term groups [422]. It is important that such groups are facilitated in such a way as to avoid confrontation. Sustained emotional distress can worsen a number of mental health conditions and a confrontational treatment approach may be harmful to clients with comorbidity [54]. It is important to assess whether the client experiences social anxiety or impairments in social judgement and social skills, as they may appear and feel awkward in group settings [422]. Readers are referred to Mueser and Pierce [422] for a more detailed discussion on the use of group interventions for comorbid disorders.