Table 2 Feasibility and acceptability data, method of measurement, and continuation rule to proceed to randomised evaluation without modification
Feasibility/acceptability outcome | Measurement | Continuation rule |
|---|---|---|
Recruitment | Quantitative data | Â |
Number of TTad sites recruited to the research project |  ≥ 3 IAPT sites recruited | |
Percentage of eligible therapists attending the training at each site |  ≥ 60% attendance | |
Percentage of attending therapists completing pre- and post-training surveys |  ≥ 80% data availability | |
Percentage of attending therapists completing 3-month follow-up surveys |  ≥ 60% data availability | |
Acceptability | Quantitative data | Â |
Feedback data on training (that that the training was theoretically interesting, clinically useful, well presented, and would recommend to other HICBT therapists) | 60% agree or strongly agree with each item | |
Qualitative data | Â | |
Written feedback from therapists on the value of training | No significant concerns emerge about training that cannot be resolved | |
Qualitative interviews with therapists | No significant concerns emerge about training that cannot be resolved | |
Reporting/identification of serious concerns about the acceptability and feasibility of training by key stakeholders | No serious concerns emerge about training that cannot be resolved | |
Reporting/identification of serious negative consequences for therapist participants or the clients they subsequently work with as a result of the training (unexpected, clearly research- or training intervention-related serious adverse reactions). | No serious consequences raised | |
Clinical outcome data completion | Quantitative data | Â |
Percentage of TTad clients receiving routine care during the study with sufficient data for inclusion in secondary analyses (at least one measure of SAPAS-SR personality difficulties and at least × 2 measures of the TTad service minimum dataset [PHQ-9, GAD-7 and WSAS]) |  ≥ 60% data availability | |
Proof-of-concept | Quantitative data | Â |
Therapist attitudinal change in confidence to recognise, assess and triage clients with personality difficulties; to adapt key skills for working therapeutically with this group; and in positivity towards working with this group after completing the training in each service. | Significant improvement from pre to post in all 5 attitudinal domains |