Table 1 Progression criteria

Recruitment—Progression criteria 1: Average number of participants recruited per month

< 4

4–7

 > 7

Follow-up—Progression criteria 2: Proportion of registered participants completing the CORE-OM at 6 months

< 60%

60–75%

 > 75%

(95% CI: 59.5%, 90.5%)

Intervention delivery—Progression criteria 3: Proportion of participants where the therapist achieved intervention fidelity in terms of safety and FReSH START components

< 60%

60–80%

 > 80%

(95% CI: 65.7%, 94.3%)

Intervention acceptability—Progression criteria 4: Proportion of registered participants attending their 1 st treatment session

< 50%

50–70%

 > 70%

(95% CI: 53.6%, 86.4%)