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Internal pilot to main trial progression rules
| Criteria | Scenario 3 | Scenario 2 | Scenario 1 |
| % of internal pilot sample size target (180 patients) recruited | <65% | 65%–79% | ≥80% |
| Intervention engagement (% participants who access e-coachER at least once) |
<65% | 65%–79% | ≥80% |
| Proposed action | No progression | Discuss with Trial Steering Committee and funder about progression and resources needed to achieve target. | Proceed to full trial. |
