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Table 2 Feasibility data and method of measurement

From: Behavioural activation written self-help to improve mood, wellbeing and quality of life in people with dementia supported by informal carers (PROMOTE): a study protocol for a single-arm feasibility study

Feasibility outcome Measurement Progression criteria to phase II pilot RCT
Recruitment Quantitative data
Percentage of people with dementia invited into the study/number of people with dementia in total identified by health professionals No criteria set
Number of health professionals required to assist with recruitment into the study No criteria set
The time taken (up to 6 months) to recruit up to 50 dyads No criteria set
Number of dyads enrolled into the study per week 2 dyads per week
Percentage of dyads willing to undergo screening/number invited (calculated for GP, PCPD and memory service recruitment) ≥15 %
Percentage of dyads overall meeting the inclusion criteria/number invited ≥5 %
Percentage of dyads overall enrolled in the study/number invited ≥5 %
Qualitative data
Reasons for exclusion reported to the research team during health professional screening (GP, PCPDs, memory service) No criteria set
Reasons for ineligibility No criteria set
Identified barriers to recruitment (reasons for refusal of participation) No criteria set
Attrition Quantitative data
  Percentage of dyads completing post-treatment (3 month) outcome measures ≥70 %
Reasons for dropout No criteria set
Qualitative data
Acceptability interviews with non-attendees and poor attendees (informal carers and people with dementia) No criteria set
Data collection procedures Quantitative data  
Time taken and number of sessions to administer the screening measures ≤2 h; ≤2 sessions
Time taken and number of sessions to administer the baseline assessment ≤2 h; ≤2 sessions
Time taken and number of sessions to administer the follow-up assessments ≤2 h; ≤2 sessions
Percentage of missing items per questionnaire ≤10 %
Qualitative data
Acceptability interviews with participants concerning acceptability of research procedures No criteria set
Acceptability interviews with PWPs concerning acceptability and feasibility of research procedures No criteria set
Clinician adherence Adherence to support protocol as determined by therapy tapes ≥70 %
Clinical delivery Quantitative data
Time between being allocated to PWP and PWP undertaking the assessment session. ≤2 weeks
Session lengths No criteria set
Number of sessions received per dyad No criteria set
Settings of sessions (e.g., BeMe, community, home) No criteria set
  Number of missed appointments No criteria set
Number of missed outcome measurement items No criteria set
PWP attrition No criteria set
Impact of severity of dementia (MMSE score) informing who can engage in the intervention No criteria set
Qualitative data
Acceptability interviews with participants No criteria set
  Acceptability interviews with PWPs No criteria set