Table 2 Traffic light criteria
Green (proceed to full trial without changes to research protocol) | Amber (adapt the protocol prior to proceeding to full trial) | Red (not progress to large-scale RCT with current protocol) | |
|---|---|---|---|
Recruitment rate | Enroll at least 20 teachers and 40 students | Enroll at least 15 teachers and 30 students | Enroll less than 15 teachers or 30 students |
Response rate | Average response rate ≥ 75% across time points and conditions | Average response rate 50–74% across time points and conditions | Average response rate ≤ 50% across time points and conditions |
Retention rate | Retention ≥ 75% for teachers and students across conditions | Retention 50–74% for teachers and students across conditions | Retention ≤ 50% for teachers and students across conditions |