Factor | Time of measurement | Instrument | Scale |
---|---|---|---|
Patient factors | |||
Gender | Baseline | Male/female | |
Age | Baseline | Years | |
Education levela | Baseline | Low/high | |
Residing distance to Reade | Baseline | In/out of Amsterdam | |
Self-management skills | Baseline | EC-17 | 0–100 |
Perceived efficacy in patient-physician interaction | Baseline | PEPPI-5 | 5–25 |
Smartphone usage | Baseline | ssMTUAS | 0–10 |
Perceived usability of the app | Month 3 | SUS | 0–100 |
Clinical factors | |||
Diagnosis | Baseline | RA/PsA/AS | |
Disease duration | Baseline | Years | |
Disease activity | Baseline | RAPID3 | 0–10 |
Comorbidity | Baseline | CCI | 0–20 |
Medication adherence | Baseline | CQR | Low/high |
Biological usage | Baseline | csDMARD only/bDMARD |