Table 3.
Responses to Systems Usability Scale (SUS) components according to computer and touchscreen ownership for participants who could use ClereMed (n=44a).
| Responses | Mean SUS score (SD) | |
|
|
Technology ownership (n=29) | No technology ownership (n=15) |
| 1. I think that I would like to use ClereMed frequentlyb | 6.55 (3.68) |
2.33 (4.06) |
| 2. I found ClereMed unnecessarily complexb | 9.22 (2.23) | 6.33 (4.81) |
| 3. I thought ClereMed was easy to use | 9.05 (2.45) | 7.33 (4.58) |
| 4. I think that I would need the support of a technical person to be able to use ClereMed | 7.07 (3.60) | 4.50 (4.25) |
| 5. I found the various functions in ClereMed were well integrated | 7.59 (3.57) | 9.17 (1.54) |
| 6. I thought there was too much inconsistency in ClereMed | 9.14 (2.03) | 8.33 (3.49) |
| 7. I would imagine that most people would learn to use ClereMed very quickly | 7.76 (3.36) | 8.00 (3.68) |
| 8. I found ClereMed very cumbersome to use | 8.79 (2.80) | 8.33 (3.62) |
| 9. I felt very confident using ClereMedb | 8.79 (2.07) | 6.17 (4.32) |
| 10. I needed to learn a lot of things before I could get going with ClereMed | 7.76 (3.68) | 5.00 (4.91) |
| Learnability scoreb (P=.04) | 74.14 (28.53) | 47.50 (42.31) |
| Usability scorec (P=.06) | 83.62 (16.32) | 70.00 (24.26) |
| Total SUS score (P=.03) | 81.72 (15.78) | 65.5 (25.06) |
aThree participants who had severe vision impairment tried by could not test the app.
bOdd numbered items (1, 3, 5, 7, 9) were scored by subtracting 1 from the mean agreement and multiplying by a factor of 2.5. Even numbered items (2, 4, 6, 8, 10) were scored by subtracting the mean agreement from 5 and then multiplying by a factor of 2.5.51
cLearnability is represented by factors 4 and 10.
dUsability is represented by factors 1-3 and 5-9.