Table 1 A priori assessment criteria used to evaluate the feasibility domains in this feasibility study
Domain | Assessment criteria | Trial feasible | Trial feasible with adjustments | Trial not feasible |
|---|---|---|---|---|
(1) Recruitment and consent | Number of patients per site consented to symptom tracking | ≥15 | 11–14 | ≤10 per site |
(2) Intervention uptake: “On-boarding” | Proportion of consented participants who successfully downloaded and registered with the app and completed at least one symptom report | ≥70% | 50–69% | <50% |
(3) Intervention adherence: “Completeness of symptom tracking” | Proportion of study days on which participants recorded at least one symptom out of all possible days | >50% | 25–50% | <25% |
(4) Outcome measurement | Proportion of participants who had ≥1 follow-up visit and at least one disease activity score available | ≥80% | 50–79% | <50% |