Table 2.

Data collection methods. Pre-implementation refers to time-period prior to intervention implementation before the feasibility study; post-implementation refers to time-period after intervention implementation during and after the feasibility study

Purpose of Method	Phase	Participants	#	Findings
IAB workshop studios: To obtain different stakeholders’ perspectives and experiences: patient mental health needs, intervention objectives, and adaptations required for intervention content and delivery, as well as study delivery.	Pre-implementation	IAB study partners (Studios 1 and 3: patients and caregivers; Studio 2: all IAB members)	3	We identified barriers and facilitators to intervention implementation based on study partner perspectives and brainstormed adaptations to make.
Weekly intervention refinement meetings: To identify pre-implementation adaptations necessary for successful PMH intervention bundle use among interventionists and patients.	Pre-implementation	Interventionists, social workers, pharmacists, psychiatrists, behavioral scientists, and research team members	12	We assessed progress in intervention bundle design We identified pre-implementation barriers to intervention delivery and brainstormed adaptations to make accordingly.
Periodic intervention reflection meeting: To reflect upon interventionists’ experiences, to collect contextual data and triangulate data for a richer understanding [51].	Post-implementation (mid-point)	Implementation scientists, interventionists, interventionist supervisor	1	We assessed study progress and interventionist experiences. We also identified barriers to intervention delivery and brainstormed adaptations to make accordingly.
Weekly patient case review meetings: To review and discuss patient intervention sessions and to document adaptations and challenges to intervention implementation.	Post-implementation	Interventionists, social workers, pharmacists, psychiatrists, behavioral scientists, and research team members	33	We assessed study progress and intervention bundle use among patients. We also identified post-implementation barriers to intervention delivery and brainstormed adaptations to make accordingly.
Audio-recordings of intervention sessions and collection of session documentation forms completed by interventionists: To capture data on progress towards MOD (adherence to medication changes, side effects) and BA (goals, values, activity scheduling and assessment) components; to also assess intervention fidelity through intervention delivery (delivering PMH intervention bundle consistently), intervention receipt (reflection of patients’ receipt and understanding of the PMH intervention bundle and their capacity to use skills taught), and intervention enactment (patients’ actual performance of MOD and BA skills and implementation of core intervention components) [52, 53].	Post-implementation	Patients and interventionists	226	We assessed intervention fidelity to core components of MOD and BA and recorded any adaptations made during each session.
Patient interviews and caregiver interviews: To assess perspectives on the intervention and study overall (see Appendix S1 for our semi-structured interview guide developed for the study [47]).	Post-implementation	Patients and caregivers from feasibility study	19	We identified patient suggestions for future improvement to study content and implementation (for adaptation evaluation only).