| Summary | Action required |
---|---|---|
Go (green) | Recruitment: > 70% expected recruitment target Follow-up: > 75% data completeness Adherence: > 75% adherence to intervention | Feasible to continue to main trial |
Amend (amber) | Recruitment: 50–70% of expected recruitment target Follow-up: 65–75% data completeness Adherence: 65–75% adherence to intervention | Identify remediable factors; discuss with trial management group |
Stop (red) | Recruitment: < 50% of expected recruitment target Follow-up: < 65% data completeness Adherence: < 65% adherence to intervention | Do not progress to main trial, unless there is a strong case that unanticipated remediable factors have been identified |