Type of influence | Amount of influence | PPI stage involved | Comment |
---|---|---|---|
Choice of population and intervention category | Moderate | Informal PPI (stage 1) | Set before formal PPI started |
Choice of trial outcome measures | Large | Informal PPI (stage 1) Online Questionnaire (stage 2) Charity Collaborator (stage 3) | Formal PPI informed the choice of specific outcomes from a range of possibilities and their definitions (for example timepoint assessed) |
Areas for exploratory analysis | Moderate | Informal PPI (stage 1) Online Questionnaire (stage 2) | Formal PPI confirmed areas of focus and provided more detail on questions of interest |
Trial design – minimising adding to anxiety over milk yield | Large | Online Questionnaire (stage 2) Charity Collaborator (stage 3) Online Panels (stage 4) | Amendments to processes and documents |
Trial design – minimising burden for participants | Large | Online Questionnaire (stage 2) Charity Collaborator (stage 3) Online Panels (stage 4) | Amendments to processes and documents. Some areas of tension decided by researchers |
Trial modifications in response to challenges | Small | Trial Steering Committee (stage 6) | Consultation. Areas of disagreement decided by researchers |
Intervention content | Very Large | Informal PPI (stage 1) Online Questionnaire (stage 2) RCT Intervention Modification Exercise (stage 5) | Iterative changes with detailed PPI input. Some disagreement among participants – final decision by researchers |
Dissemination plan | Very Large | Online Questionnaire (stage 2) | Detailed list of vehicles of communication for dissemination provided by PPI, along with assessment of most significant channels |
Future research topics | Large | Informal PPI (stage 1) Online Questionnaire (stage 2) | Broad range of questions posed |