Table 1.

Descriptive information on the participants in the validity and reliability studies#

	Validity Study				Reliability Study
	Complete Actigraph Sample*		Full Sample
	n = 120	%	n = 177	%	n = 109	%
Race
White	87	72.5	119	67.2	79	72.5
Black	17	14.2	38	21.5	29	26.6
Other	16	13.3	20	11.3	1	0.9
Education
< = High school	1	0.8	8	4.5	35	33.7
Some college	22	18.3	40	22.6	14	13.5
College +	97	80.8	129	72.9	55	52.9
Age group
<20	2	1.7	7	4.0	9	8.3
20-29	45	37.5	76	43.0	47	43.1
30+	73	60.8	94	53.1	53	48.6
General Health
Excellent	60	50.0	74	41.8	34	31.2
Very Good	44	36.7	74	41.8	46	42.2
Good	12	10.0	22	12.4	22	20.2
Fair	2	1.7	5	2.8	7	6.4
Poor	2	1.7	2	1.1	0	0.0
Currently working
Yes	78	65.0	118	66.7	72	66.1
No	42	35.0	59	33.3	37	33.9

*Complete data was defined as having nonmissing counts over at least 70% of a standard measurement day, with a standard measurement day defined as the length of time in which at least 70% of participants were wearing the monitor. This was defined separately for weekdays and weekends.

#In some cases the values may not add to the sample size due to missing values.