Figure B.1.

The system of equations underlying the mediation models. Preacher, Zyphur, and Zhang (2009) have named this approach the “unconflated multilevel model” implemented within a multilevel structural equation model framework.

Note:

RDD= risky drinking days, OP=post-discharge outpatient addiction treatment. An analogous approach was used for the outcome of abstinence and for the mediator of mutual help attendance.

γ₁ in this figure corresponds to path c’ in Figure 1.

γ₂ in this figure corresponds to path b₁ in Figure 1.

γ₁₁ in this figure corresponds to path a₁ in Figure 1.