12-step involvement and peer helping in day hospital and residential programs.

This study compares peer helping and 12-step involvement among participants receiving chemical dependency treatment at day hospital (N = 503) and residential (N = 230) programs, and examines relationships between both variables and outcomes. Findings show that residential (vs. day hospital) participants reported significantly more peer helping and 12-step involvement during treatment, and marginally more 12-step involvement at 6 months. Both peer helping and 12-step involvement predicted higher odds of sobriety across follow-ups; helping showed an indirect effect on sobriety via 12-step involvement. Results contribute to the 12-step facilitation literature; confirm prior results regarding benefits of mutual aid; and highlight methodological issues in helping research. The study's limitations are noted.