. 2021 Oct 28;5(10):e31086. doi: 10.2196/31086

Table 5.

Postparticipation survey: usability domain.

Subdomains and questions			Total percentage agreement^a (N=32)^b, % (n/N)		App percentage agreement^a (N=20)^b, % (n/N)		Tag percentage agreement^a (N=12)^b, % (n/N)		P value^c
Ease of use
	It was easy for me to install the app on the device.	81 (25/31)		84 (16/19)		75 (9/12)		.53
	It was easy for me to learn to use the app.	97 (31/32)		95 (19/20)		100 (12/12)		.43
	The app was easy to use.	97 (31/32)		95 (19/20)		100 (12/12)		.43
Interface and satisfaction
	I like the interface of the app.	66 (21/32)		65 (13/20)		66 (8/12)		.92
	The information in the app was well organized, so I could easily find the information I needed.	71 (22/31)		63 (12/19)		83 (10/12)		.23
	The app adequately acknowledged and provided information to let me know the progress of my action.	58 (18/31)		53 (10/19)		66 (8/12)		.44
	The amount of time involved in using the app is acceptable.	91 (29/32)		85 (17/20)		100 (12/12)		.16
	I would use this system again.	78 (25/32)		70 (14/20)		92 (11/12)		.15
	Overall, I am satisfied with this system.	81 (26/32)		80 (16/20)		83 (10/12)		.82

^aPercentage agreement was calculated by dividing the number of Likert responses indicating agreement by the total number of Likert responses for each question.

^bSome questions were not answered by all participants; exact counts of agreement and total responses are shown in parentheses for each question.

^cP values obtained using tests of proportions to evaluate differences between pilots.