Table 2.

Smartphone app usability (the Unified Theory of Acceptance and Use of Technology 2 questionnaire constructs) at 6 and 16 weeks.

Construct (7-point Likert scalea)	6 weeks (n=15), median (IQR)	16 weeks (n=12), median (IQR)
Performance expectancy	4.25 (2.5-5.25)	1.75 (1-2.94)
Effort expectancy	4.5 (3.75-5.75)	3.5 (3-4.25)
Social influence	4 (3.5-4.17)	2 (1-4)
Facilitating conditions	4.88 (4.19-6.06)	4.75 (3.75-6.25)
Hedonistic motivation	4.17 (3.83-5)	1.5 (1-3.25)
Habit	3.75 (2-4.25)	1 (1-3)
Behavioral intention	4 (2.33-6)	1 (1-4.33)

^aLikert scale: 1=strongly disagree; 4=neutral; and 7=strongly agree.