Table 9.
System Usability Scale responses. Descriptive statistics (N, mean value, standard deviation and 95% confidence interval) for the pooled cohort (N = 306, Cohorts 1,2,3,4,5 and 6 combined) responses
| Question # | Question Text | Cohort | N | Mean | Std. Dev. | 95% C.I. |
|---|---|---|---|---|---|---|
| Q1 | I think that I would like to use this system frequently | All | 305 | 4.06 | 0.97 | 0.11 |
| Q2 | I found the system unnecessarily complex | All | 306 | 2.11 | 1.19 | 0.14 |
| Q3 | I thought the system was easy to use | All | 306 | 4.22 | 0.92 | 0.10 |
| Q4 | I think that I would need the support of a technical person to be able to use this system | All | 306 | 2.12 | 1.25 | 0.14 |
| Q5 | I found the various functions in this system were well integrated | All | 305 | 3.95 | 0.93 | 0.11 |
| Q6 | I thought there was too much inconsistency in this system | All | 306 | 2.02 | 1.06 | 0.12 |
| Q7 | I would imagine that most people would learn to use this system very quickly | All | 305 | 4.19 | 0.87 | 0.10 |
| Q8 | I found the system very cumbersome to use | All | 300 | 2.53 | 1.25 | 0.14 |
| Q9 | I felt very confident using the system | All | 306 | 4.29 | 0.82 | 0.09 |
| Q10 | I needed to learn a lot of things before I could get going with this system | All | 306 | 2.27 | 1.28 | 0.15 |