Does the effectiveness of mutual aid depend on compatibility with treatment philosophies offered at residential rehabilitation services?

<bold>Background: </bold>Residential rehabilitation treatment (including both Therapeutic Communities (TC) and non-TC rehabs) is a key component of service delivery for people seeking treatment for substance use disorders in Australia and globally. While mutual aid is often associated with better long-term outcomes, there is little evidence about whether inconsistencies between residential rehabilitation philosophies and particular types of mutual aid influence subsequent engagement and treatment outcomes.<bold>Objective: </bold>To assess the uptake of mutual aid groups (12-step and other) on individuals leaving TC (n = 58) or non-TC (n = 78) residential treatment, and measure its impact on substance use outcomes.<bold>Methods: </bold>Using secondary analysis of existing data, the current paper reports on 12-month outcomes from a prospective cohort study of 230 individuals entering specialist alcohol and other drug residential rehabilitation treatment in two Australian states.<bold>Results: </bold>Participants who attended TC settings were more likely to attend non-spiritual mutual aid groups (i.e., SMART Recovery) than non-TC residents. Engaging in mutual aid groups was associated with significantly improved outcomes for the non-TC residents only, where it significantly predicted abstinence (OR = 5.8, CI = 1.5-18.46) and reduced frequency of use of participants' primary drug of concern (OR = 8.6, CI = 2.6-28.6).<bold>Conclusions/importance: </bold>Although 12-step is the most readily available and accessible form of mutual aid in Australia and benefited those attending non-TC residential rehabilitation, individuals exiting a TC program (whether they have completed treatment or not) may benefit from other forms of post-treatment recovery support, including alternative forms of peer-based support. The findings suggest treatment outcomes may be enhanced when the philosophies of residential treatment and post-discharge mutual aid are more compatible. [ABSTRACT FROM AUTHOR]