Table 2.

Data extraction variables

Article	Title Year Authors Journal Country
Population	CKD definition/stage and treatment modality (if applicable) Mean/median age Sex Secondary diagnoses/health conditions Income (if given) Marital status Education Sampling method Eligibility (inclusion/exclusion) criteria Baseline cognitive status
Intervention	Aims Theoretical rationale Stakeholder involvement Materials Provider(s) Mode of delivery Procedures Setting Dose/duration Tailoring Treatment fidelity Withdrawal rate
Study and Results	Study design Control condition used Assessment time points Outcome measures used How outcomes examined (i.e., statistical approaches) Results (positive, negative, unchanged)