Table 3.
Descriptive frequencies of aggregate user errors and device malfunctions.
| Error class and type | Value, n (%) | Error category | |||||||
|
|
|
Perception | Cognition | Action | |||||
| User error (n=70) |
|
|
|
|
|||||
|
|
Incorrect tape use | 5 (7) |
|
✓ |
|
||||
|
|
Incorrect test kit use | 12 (17) |
|
✓ |
|
||||
|
|
Incorrect app use | 11 (16) | ✓ |
|
|
||||
|
|
Incorrect test kit insertion into imaging slot | 8 (11) | ✓ |
|
|
||||
|
|
Failure to perform thumb press | 15 (21) |
|
|
✓ | ||||
|
|
Device powering | 19 (27) |
|
|
✓ | ||||
| Device malfunction (n=59) |
|
|
|
|
|||||
|
|
Unresponsive switches | 8 (14) |
|
|
✓ | ||||
|
|
Poor test kit fit | 5 (9) |
|
|
✓ | ||||
|
|
Poor fitting tape | 18 (31) |
|
|
✓ | ||||
|
|
Loss of device power | 27 (46) |
|
|
✓ | ||||
|
|
App closure | 1 (2) |
|
|
✓ | ||||