Responses to individual System Usability Scale questions
| Question | Median (IQR) | Mean (SD) |
| 1. I like using the system | 3 (2–4) | 2.8 (1.3) |
| 2. I find the system unnecessarily complex | 4 (2–4) | 3.4 (1.3) |
| 3. I think the system is easy to use | 3 (2–4) | 2.9 (1.3) |
| 4. I need the support of a technical person to use the system | 2 (1–3) | 2.2 (1.1) |
| 5. I find the various functions in the system are well integrated | 2 (1–4) | 2.5 (1.3) |
| 6. I think there is too much inconsistency in the system | 3 (2–4) | 3.3 (1.2) |
| 7. I learnt to use the system very quickly | 4 (3–4) | 3.5 (1.1) |
| 8. I find the system very cumbersome to use | 4 (2–4) | 3.4 (1.3) |
| 9. I feel very confident using the system | 4 (3–4) | 3.7 (1.0) |
| 10. I needed to learn a lot of things before I could get going with this system | 3 (2–4) | 3.0 (1.2) |