Table 4.

Usable and unusable data from returned and worn accelerometers by race-sex groups (N=9,973)

Usability Category of returned and worn accelerometer		Total (9,973) (100%)	Black Women (2,138)	Black Men (1,265)	White Women (3,354)	White Men (3,216)
Exclusions resulting in unusable data*		1,877	548	296	558	475
	Less those with device errors	231	53	31	85	62
	Less those missing log sheet	952	275	161	287	229
	Less those with < 4 days with ≥ 10 hr/day wear time	694	220	104	186	184
Usable data		8,096 (81.1%)	1,590 (74.4%)	969 (76.6%)	2,796 (83.4%)	2,741 (85.2%)

^*Exclusion reasons were applied sequentially, e.g., subtracting those with device errors, then subtracting those missing log sheet, and finally, subtracting those worn < 4 days with ≥ 10 hr/day wear time