Table 3 Feasibility outcome measures and target values

1. Recruitment rate over 11.25 subjects per month over the course of 12 months

2. Recruitment target of 135 participants reached over the course of 12 months

3. Recruitment costs approximately 100 EUR per subject

4. Attrition rates less than 25% based on sample size calculations

5. Differential attrition rates no less than 25% per study arm

6. Retention rates over 75%

7. Adherence/Compliance to protocol with at least 80% of attendance to weekly sessions

8. Location, room sizes, and equipment were sufficient

9. Completeness of data at least 90% complete for baseline and follow-up tests

10. Acceptability of intervention by study personnel and minimal issues raised by staff

11. Study fidelity adherence by staff and researchers