Patient-Concerned Other Dyads' 12-Step Involvement and Patients' Substance Use: A Latent Class Growth Model Analysis.

Clinicians should encourage patients' and COs' 12-step group involvement (12-step practices' engagement). Among patients treated for AUD, AA involvement was related to better outcomes, and to COs' lessened concern about the patients' drinking. COs' Al-Anon involvement was associated with having a more positive view of their relationship with the patient. That more than one-third of dyads had low 12-step group involvement suggests that treatment programs may need to facilitate involvement in non-12-step mutual-help groups.