. 2019 Jul 24;7(3):e14185. doi: 10.2196/14185

Table 3.

The average scores of system usability scale given by the clinical research coordinator participants.

Statements	Five-point scale (1-5)^a, mean (SD)
	Fall^b	Winter^c	Spring^d	Summer^e
1. I would like to use this system frequently.	2.4 (1.1)	3.2 (1.1)	3.7 (0.9)	3.2 (0.6)
2. I found the system unnecessarily complex.	2.1 (1.0)	1.8 (1.4)	1.5 (0.5)	1.4 (0.7)
3. I thought the system was easy to use.	4.6 (0.5)	4.5 (0.5)	4.7 (0.5)	4.7 (0.5)
4. I would need the support of a technician to use this system.	1.7 (1.1)	1.1 (0.4)	1.2 (0.4)	1.1 (0.4)
5. The various functions in the system were well integrated.	3.3 (0.6)	3.3 (1.1)	3.8 (0.4)	3.7 (0.7)
6. I thought there was too much inconsistency in this system.	3.1 (1.1)	3.6 (1.0)	3.3 (0.7)	2.1 (1.0)
7. Most people would learn to use this system very quickly.	4.5 (0.8)	4.5 (0.5)	4.5 (0.5)	4.4 (0.8)
8. I found the system very cumbersome to use.	3.3 (1.3)	2.3 (0.9)	2.0 (1.0)	1.9 (0.9)
9. I felt very confident using the system.	4.0 (1.3)	4.2 (0.5)	4.7 (0.5)	4.0 (1.2)
10. I needed to learn a lot of things before I could use this system.	1.3 (0.4)	1.6 (0.5)	2.2 (1.3)	1.4 (0.4)

^a1 indicates strongly disagree and 5 strongly agree.

^bOverall score of system usability scale (SUS): 67.9.

^cOverall score of SUS: 72.5.

^dOverall score of SUS: 78.0.

^eOverall score of SUS: 80.0.