Table 2 Domains and methods for process evaluation
Source | Domain | Data collection method | Stage of the trial |
|---|---|---|---|
Trial registers | Recruitment Retention | Registers in the trial office | Throughout the trial (n = 700) |
Participants | Fidelity Reach Dose received Effectiveness | Participant Questionnaire 2 Focus group discussions at 6 months | At recruitment (n = 700) Three months: n = 10% pf participants in each intervention cluster(35) Six months: n = 10-% of participants in each cluster (35) N = 28 |
Non-participant observations by PI | Recruitment Fidelity Dose delivered Context | PI Field notes | N = 2 group meetings per intervention cluster during the trial (14) |
Peer supporters (PS) | Effectiveness Reach Fidelity Dose delivered Context | PS Questionnaires PS Diary for telephone calls PS Group session report form Focus group discussion at 6 months | After training (n = 14) Through the trial (n = 14) Throughout the study (1 report form per group meeting per PS) N = 7 |
Eye care workers Key informants | Context | In-depth interviews | At 6 months N = 3 N = 7 |
Research project manager | Reach Fidelity Dose delivered | Reports | At recruitment of PS At training the PS At 3 and 6 months |
Research nurse | Outcome evaluation procedures | Report | At 3 months and 6 months |
Study steering committee | Context | Spreadsheet of external events that may have affected study outcomes | At 6 months |