Table 2.

System usability scale scores

The system usability scale items	Mean (SD) score
Q1: I think that I would like to use this system frequently	4.6 (0.7)
Q2: I found the system unnecessarily complex	1.4 (0.5)
Q3: I thought the system was easy to use	4.7 (0.5)
Q4: I think that I would need the support of a technical person to be able to use this system	2.1 (1.3)
Q5: I found the various functions in this system were well integrated	4.5 (0.8)
Q6: I thought there was too much inconsistency in this system	1.6 (0.7)
Q7: I would imagine that most people would learn to use this system very quickly	4.3 (0.6)
Q8: I found the system very cumbersome to use	1.5 (0.8)
Q9: I felt very confident using the system	4.2 (1.0)
Q10: I needed to learn a lot of things before I could get going with this system	2.7 (1.5)
Total	82.6 (11.5)