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Table 1 Feasibility questions, assessments and assessment methods

From: The Herts and Minds study: feasibility of a randomised controlled trial of Mentalization-Based Treatment versus usual care to support the wellbeing of children in foster care

Feasibility Question How was feasibility assessed? Assessment methods When was feasibility assessed?
Is it feasible to recruit participants? Number of families and children referred to the Targeted CAMHS team, documenting reasons for ineligibility or study decline Recruitment log From trial open to close.
It is possible to train therapists to an appropriate level of treatment integrity? Skill level in delivering MBT was assessed in the MBT and UCC study arms
Therapists’ views regarding treatment integrity
MBT-Fostering- Adherence and Competence Scale [MBT-F-ACS; (Wood S, Besser S, Midgley N: MBT-Fostering- Adherence and Competence Scale (MBTF-ACS), unpublished)]
Focus groups with targeted team clinicians
During and after intervention period
Is MBT acceptable and credible? Monitoring of attendance and drop out of therapy sessions
Participants’ and professionals’ views regarding treatment acceptability
Treatment attendance log
Semi-structured interviews / focus groups with foster carers, social workers and targeted team clinicians
Intervention period
Interviews at final follow-up (24 weeks)
Is a trial feasible and acceptable? The extent to which children, carers, and therapists complete study assessments
Participants’ views of the study procedures, and facilitators and barriers to participating in the study
Withdrawal from treatment, and/or from the study
Completion rate of all measures (see Additional file 1)
Semi-structured interviews with foster carers
Recruitment log
Final analysis at trial close
Interviews at final follow-up (24 weeks)
Throughout the trial
Is it feasible to collect resource use and quality of life data for economic evaluation? Completion of a) resource use schedule modified for the population of interest and b) health-related quality-of-life assessment tools Child and Adolescent Service Use Schedule (CA-SUS) [18] and Child Health Utility (CHU-9D) measure of health-related quality of life [19] Baseline, weeks 12 and 24
What is the likely effect size? The likely effect size for the MBT intervention, compared to UCC Strengths and Difficulties Questionnaire (SDQ, Goodman and Goodman 2012) [20] Baseline, weeks 12 and 24
  1. Note: See Additional file 1 for full details of all measures