| Subject ID | 1 Month FU | 3 Month FU | ||
|
| Usability | Outcome | Usability | Outcome |
| 1 | 3 | 2 | 3 | 2 |
| 2 | 3 | 3 | 3 | 3 |
| 3 | 3 | 3 | 3 | 3 |
| 4 | 3 | 2 | 3 | 3 |
| 5 | 3 | 2 | 3 | 3 |
| 6 | 3 | 1 | 3 | 2 |
| 7 | 3 | 3 | 3 | 3 |
| 8 | 3 | 3 | 3 | 3 |
| 9 | 3 | 3 | 3 | 3 |
| 10 | 3 | 2 | 3 | 3 |
| 11 | 3 | 2 | 3 | 3 |
| 12 | 3 | 3 | 3 | 3 |
| 13 | 3 | 3 | 3 | 3 |
| 14 | 3 | 2 | 3 | 3 |
| 15 | 3 | 3 | 3 | 3 |
| Mean | 3.0 | 2.5 | 3.0 | 2.9 |