Table 1 Feasibility outcomes and evaluation

1. Feasibility of participant recruitment

Numbers assessed for eligibility, numbers eligible, reasons for ineligibility, reasons for non-participation, and numbers randomised

2. Appropriateness of data collection processes and outcome measures

Number of missing items and follow-up rates

3. Participant understanding of study information

Qualitative process interviews with participants following participation

4. Estimation of sample size to inform a phase III RCT

Differences at follow-up between study arms in the number of participants that reach an ICD-10 diagnosis of depression using the CIS-R [32]

5. Level of study attrition

Study and treatment drop-out rates

6. Estimate of the resources and costs needed to deliver the intervention

Variability in the number, length, and frequency of support sessions provided by psychological wellbeing practitioners

7. Acceptability towards the cognitive behavioural therapy self-help intervention received, and engagement with the BAcPAc intervention

Qualitative process interviews undertaken with participants following participation