Quantitative Data
We present frequency, duration, and coverage of material (feasibility), perceptions of activities (acceptability), extent to which staff attended trainings, consultation and S-L sessions (engagement), and extent to which they presented planned content (adherence) and youth completed assignments and activities (dosage). Findings were interpreted with stakeholders. Influence on youth outcomes measured longitudinally was tested using Linear Mixed-Effects Models in SPSS. All models included youth, gender, and age at baseline as fixed effects, with time modeled as a repeated factor. For parent and youth report of outcomes, time had three levels: baseline, post-test, and follow-up. For S-L staff reports of outcomes, time included baseline and post-test reports only. Models used restricted maximum likelihood estimation with an unstructured covariance matrix between time points. The mixed-effects approach allowed us to retain all 