Table 2.

Reasons for Missing Ankle Accelerometer Data (n=459)

Category	Specific Reasons	N (%)
Had valid data	--	386 (84.1%)
Refusal	Refused to wear the accelerometer	2 (0.4%)
Participant Compliance	Lost or did not return the accelerometer	23 (5.0%)
	Wore accelerometer for less than two days*	13 (2.8%)
Technical Problems	Staff training (i.e.: improper programming and documentation)	24 (5.2%)
	Device malfunction	11 (2.4%)

^*because the first and last days are truncated, if the participant wore the accelerometer for 2 or fewer days the data cannot be used