Progression criteria | Measurement | Green | Amber | Red |
---|---|---|---|---|
Recruitment | Number of participants recruited over 6 months | 24 | 12–23 | < 12 |
Recruitment | Qualitative process evaluation | Most participants find the recruitment procedures acceptable or only minor amendments needed. | Participants’ views on acceptability conflicting or larger changes needed. | Most participants find unacceptable or changes needed unfeasible. |
Randomization | Qualitative process evaluation | Most participants understand the randomization process and find it acceptable. | Participants’ understanding and views on acceptability conflicting. | Most participants do not understand process or find it unacceptable |
Follow-up (total and by trial arms) | Proportion of enrolled participants providing primary outcome data at 6 months post-randomization | > 50% | 31–50% | ≤ 30% |
Follow-up (total and by trial arms) | Qualitative process evaluation | Most participants find the follow up process acceptable or only minor amendments needed. | Participants’ views on acceptability conflicting or larger changes needed. | Most participants find processes unacceptable or changes needed unfeasible. |
Uptake of TI-MBCT | Proportion of participants who took up the mindfulness group out of those randomized in the intervention arm [27, 28] | > 70% | 50–69% | < 50% |
Retention in TI-MBCT group | Proportion of participants in the intervention arm who received at least four sessions [29, 30] | ≥ 60% | 40–59% | < 40% |
TI-MBCT acceptability | Qualitative process evaluation | Most participants find the mindfulness group acceptable or only minor amendments needed. | Views on acceptability conflicting or larger changes needed. | Most participants find unacceptable or changes needed unfeasible. |
Data collection methods | Qualitative process evaluation | Most participants find the data collection procedures acceptable or only minor amendments needed. | Views on acceptability conflicting or larger changes needed. | Most participants find unacceptable or changes needed unfeasible. |