Table 1

Framework and data collection for the process evaluation

ComponentDefinitionData collection
RecruitmentSuccess of methods used to approach and recruit participantsParent self-reported questionnaire at baseline: how they heard about the trial
ReachDegree to which an intended audience participates in an intervention
  1. Parent self-reported questionnaire at baseline: sociodemographic characteristics, to define if participants reflect the population

  2. Child height and weight measurements

Dose receivedExtent of engagement with the FFH and UC interventions by the target population
  1. Parent evaluation questionnaires of each session and end of programme (FFH only)

  2. Parent and child one-to-one structured interviews at 3 months (ie, post-intervention)

Dose deliveredThe ‘amount’ of intervention provided by the FFH intervention team
  1. Attendance data

  2. Facilitators' weekly evaluation forms

  3. Facilitators focus groups

FidelityThe extent to which the FFH intervention was delivered as planned ie, quality and integrity of intervention
  1. Fidelity visits for three to four sessions

  2. Facilitators’ focus groups

Perceived impact of interventionAssessment by intervention participants of the impact of the intervention on themselvesParent one-to-one structured interviews at 12 months (from baseline)
  • FFH, Families for Health; UC, usual care.