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Table 3 Framework for process evaluation

From: Evaluation of the effectiveness and cost-effectiveness of Families for Health V2 for the treatment of childhood obesity: study protocol for a randomized controlled trial

Component Definition How assessed in evaluation
Recruitment Success of methods used to approach and recruit participants Baseline questionnaire asking parents how they heard about the trial and how they were referred
Reach Degree to which an intended audience participates in an intervention Baseline questionnaire with parents asked about socio-demographic characteristics, to define if participants reflect the locality populations and if any sub-groups were more or less likely to participate
Dose delivered The amount of intervention provided by the intervention team (1) Facilitators will keep notes about unavoidable changes to the program enabling assessment of the number of sessions delivered as planned
(2) Facilitators’ weekly evaluation forms
(3) Recording of additional interventions or care accessed by both groups
Dose received Extent of engagement with the intervention by the target population (1) Facilitators will log attendance by families, including withdrawals
(2) Parents’ weekly evaluation questionnaires of the sessions
(3) Parents end-of-program questionnaire and interviews, reporting changes made
Fidelity The extent to which the intervention was delivered as planned, that is, the quality and integrity of the intervention (1) For three to four sessions (randomly selected) on each Families for Health program, the fidelity will be addressed indirectly from:
- flip-charts used and developed during the session
- the parents’ end-of-session evaluation, covering whether the session’s topics were mentioned and their perception of the facilitators and the program
- facilitators’ weekly log of their delivery of the program, recording how it went and any variations
(2) Interviews with facilitators at the end of the program
   (3) Parents’ end-of-program questionnaire