Table 5.

The Post-Study System Usability Questionnaire (N = 30).

	Items		Mean (SD)b	Rangea
System usefulness	1	Overall, I am satisfied with how easy it is to use this system.	1.4 (0.36)	1–2
	2	It was simple to use this system.	1.4 (0.36)	1–2
	3	I could effectively find all the information using this system.	1.4 (0.36)	1–2
	4	I felt comfortable using this system.	1.3 (0.45)	1–2
	5	It was easy to learn to use this system.	1.3 (0.45)	1–2
	6	I believe I can learn how to reduce the risk of lymphedema and manage lymphedema symptoms using this system.	1.1 (0.25)	1–2
Interface quality	7	The system gave error messages that clearly told me how to fix the problems.	Not applicable
	8	Whenever I made a mistake using the system, I could recover easily and quickly.	Not applicable
	9	The information (such as on-line help, on-screen messages and other documentation) provided with this system was clear.	Not applicable
Information quality	10	It was easy to find the information I needed.	1.1 (0.25)	1–2
	11	The information provided for the system was easy to understand.	1.2 (0.44)	1–2
	12	The information was effective in helping me to learn about lymphedema, symptoms and self-care strategies.	1.1 (0.25)	1–2
	13	The organization of information on the system screens was clear.	1.3 (0.45)	1–2
	14	Overall I am very satisfied with the system.	1.1 (0.25)	1–2

^aOn a scale of 1 to 7, 1 represents strongly agree and 7 represents strongly disagree.

^bSD: Standard Deviation.