Table 1 Table of feasibility parameters and criteria for progression to full trial
Feasibility parameter | Method of measurement | Progression criteria: green (satisfactory), amber (review), red (fail) | ||
|---|---|---|---|---|
Green | Amber | Red | ||
Participant recruitment | Percentage of participants approached by LAs, and who are eligible and consent (and thus are willing to be randomised). | ≥50% | 30 to <50% | <30% |
LA recruitment | Number of LAs who entered trial as a proportion of those approached and who showed some interest in taking part. | ≥50% | 30 to <50% | <30% |
Participant retention | Percentage of participants retained at final follow-up timepoint as a proportion of those recruited. | ≥65% | 50 to <65% | <50% |
Adherence | LA adheres to assignment of participant to randomised allocation. | ≥80% | 50 to <80% | <50% |