Table 1.

Socio-demographic, medical, health risk, social and contextual characteristics of study participants.^a

Variables (%)	White 27,309 (88%)	Black 3,750 (12%)	P
Sex			<0.0001
Male	41	38
Female	64	62
Age			<0.0001
18–24	2	4
25–34	8	12
35–44	13	16
45–54	21	24
55–64	24	21
≥65	33	22
Education			<0.0001
Less than high school	5	13
High school	31	28
College graduate	37	26
Marital status			<0.0001
Married	61	35
Widowed	15	15
Divorced	13	18
Never married	9	25
Household income (>$35,000)	9	11	<0.0001
Smoking status (current)	83	81	<0.0001
Alcohol consumption (current drinker)	52	34	<0.0001
Physical limitation	24	24
Regular physical exams (within the past year)	83	73	<0.0001
Social and emotional support (always)	82	66	<0.0001
Satisfied with life (yes)	95	92	<0.0001
Hours worked per week (>40 h)	39	26	<0.0001
Care-giving (yes)	25	26
Insufficient sleep			<0.0001
<7 hb	33	47
>8 h	16	11
Self-report co-morbid conditions
High cholesterol	43	41	<0.010
Diabetes	11	21	<0.0001
Hypertension	38	53	<0.0001
Stroke	4	6	<0.0001
Heart disease	6	6
Arthritis	35	36
Cancer	15	7	<0.0001
Overweight/obesity	62	73	<0.0001

Legend: weighted sample.

^aCategories might not sum to survey total because of missing responses.

^bInsufficient sleep referenced to 7–8 hour sleepers.