Table 2.

Comparison of Pre- and Postprotocol Survey Assessments of Acceptability

	Preprotocol, % (n)	Postprotocol, % (n)	p
I am comfortable with the research study tracking where I go.	92.9 (13)	75.7 (12)	0.999
GPS makes it more interesting to participate in the study	78.6 (11)	64.3 (9)	0.625
I am worried about someone trying to steal the GPS.	0.0 (0)	14.3 (2)	—
The GPS seems uncomfortable to wear.	0.0 (0)	7.1 (1)	—
I am concerned that I will lose the GPS.	7.1 (1)	21.4 (3)	0.223
I am worried about my safety wearing the GPS.	0.0 (0)	7.1 (1)	—
I am concerned about how I will look wearing the GPS.	14.3 (2)	7.1 (1)	0.344

The pre- and postprotocol columns represent the frequency of those responding “Agree” or “Somewhat Agree” to each of the items.

GPS, global positioning system.