Table 2 MyComrade progression criteria
|  | Go—proceed with RCT | Amend—proceed with changes | Stop—do not proceed unless changes are possible |
|---|---|---|---|
1. Feasibility of practice recruitment Can 16 practices be recruited to take part in 3 months (8 practices in NI and 8 in ROI)? | If > 14 practices are recruited to take part in 3 months | If > 14 practices are recruited, but it takes longer than predicted (e.g. 3–6 months) | Unable to recruit practices |
2. Feasibility of patient recruitment Can 20 patients per practice (total N = 320) be recruited? | If 20 patients are recruited in one month per practice; a total of 320 (100%) | If 10–19 patients are recruited in one month per practice; a total of 160–319 (50 to < 100%) | If < 10 patients are recruited in one month per practice; a total of < 159 (50%) |
3. Feasibility of practice retention Can > 14 practices be retained in the study until completion? | > 14 (88%) retained | > 12 (75%) retained | < 12 retained |
4. Feasibility of patient retention Can at least 80% of recruited patients be retained in the study until completion? | > 256 (80%) retained | 224–255 (70–80%) retained | < 224 retained |
5. Intervention implementation | Delivery of intervention judged strongly feasible by qualitative data | Delivery of intervention judged feasible by qualitative data | Delivery of intervention judged possibly feasible by qualitative data |