Table 6.

Results of the ranking exercise in which participants were asked to rank the most important factors that would determine their engagement with a wearable device.

Rank	Group 1	Group 2	Group 3
1	Ease of use	Accuracy	Accuracy
2	Getting feedback from the device	Cost	Comfort
3	Comfort	Comfort	Ease of use
4	Keeping data safe and secure	Battery life	Where the tracker is located on the body
5	Accuracy	Keeping data safe and secure	Keeping data safe and secure
6	Battery life	Obtaining feedback from the device	Obtaining feedback from the device
7	Where the tracker is located on the body	Ease of use	Cost
8	Cost	Where the tracker is located on the body	Battery life
9	Being able to use the watch for things not related to the study	Being able to use the watch for things not related to the study	Appearance
10	Appearance	Appearance	Being able to use the watch for things not related to the study