Table 1.

Number and percentage (unless otherwise noted) of study participants’ characteristics.

Characteristic		Total (N = 46)	Completed study and were light mask compliant (n = 23)	Completed the study and were light mask + Actiwatch compliant (n = 17)
Age at intake (mean [SD])		60.8 (7.4)	62.8 (1.8)	64.2 (2.1)
Female		30 (65)	14 (61)	11 (65)
Race:	African American	14 (30)	11 (48)	8 (47)
	White	32 (70)	12 (52)	9 (53)
Education:	High school/GED	8 (17)	4 (17)	3 (18)
	< 4 years college	15 (33)	7 (30)	6 (35)
	≥ 4 years college	23 (50)	12 (52)	8 (47)
Marital status:	Never married	6 (13)	4 (17)	3 (18)
	Married	27 (59)	12 (52)	8 (47)
	Divorced	13 (28)	7 (30)	6 (35)
Sleep with another person in the room		26 (57)	11 (48)	7 (41)
Alcoholic drinks/day:	0	26 (57)	16 (70)	12 (71)
	1	15 (33)	6 (26)	4 (24)
	2–4	5 (11)	1 (4)	1 (6)
Caffeinated drinks/day:	0	9 (20)	5 (22)	4 (24)
	1	9 (20)	5 (22)	3 (18)
	2–4	28 (61)	13 (57)	10 (59)
Health problems	Heart disease	1 (2)	0 (0)	0 (0)
	Arthritis	16 (35)	12 (52)	9 (53)
	Osteoporosis	6 (13)	1 (4)	1 (6)
	Depression	9 (20)	2 (9)	1 (6)
	Anxiety	6 (13)	3 (13)	3 (18)
	Alcoholism	2 (4)	1 (4)	0 (0)