Table 2.

ANSWER usability testing results

	All (n = 15)	Cycle 1: Before modification (n = 10)	Cycle 2: After modification (n = 5)
Time to complete ANSWER in minutes (SD)	56.08 (34.80)	55.50 (37.98)	57.00 (33.28)
Modified system usability scale items (SD)
(1 = Strongly disagree; 5 = Strongly agree):
1. I liked using ANSWER as a tool for making an informed decision about using methotrexate as a treatment option for my RA	4.13 (1.06)	4.20 (1.23)	4.00 (0.71)
2. I found ANSWER unnecessarily complex	1.20 (0.56)	1.10 (0.32)	1.40 (0.89)
3. I thought ANSWER was easy to use	4.07 (1.34)	3.80 (1.55)	4.60 (0.55)
4. I think I would need the support of a technical person to be able to use ANSWER	1.60 (1.06)	1.70 (1.25)	1.40 (0.55)
5. I found the content and navigation in ANSWER was well integrated	3.73 (1.10)	3.60 (1.27)	4.00 (0.71)
6. I thought there was too much inconsistency between the design and navigation of ANSWER	1.87 (1.19)	1.60 (0.84)	2.40 (1.67)
7. I would imagine that most patients with RA would learn to use ANSWER very quickly	4.47 (1.06)	4.50 (1.27)	4.40 (0.55)
8. I found ANSWER very cumbersome to use	1.73 (1.39)	1.50 (1.27)	2.20 (1.64)
9. I would be very confident using ANSWER	4.13 (1.19)	4.00 (1.41)	4.40 (0.55)
10. I would need to learn a lot of things about using computers before I could get going with ANSWER	1.67 (0.90)	1.70 (1.06)	1.60 (0.55)
Total System Usability Scale score (SD)	81.17 (13.53)	81.25 (14.92)	81.00 (11.81)
(Scores of the 10 items were transformed into a summary score ranging from 0 to 100; higher = more user friendly)