Table 3.

Participant Characteristics Associated with Total Sleep Time (N = 2,862)

	< 5 hours	5 to < 7 hours	7 to < 8 hours	8 + hours	p-value
N (%)	344 (12)	1,602 (56)	704 (24.6)	212 (7.4)
Age, mean	76.43 ± 5.64	76.12 ± 5.35	76.48 ± 5.72	77.59 ± 5.64 †	0.003
Subjective social status, mean	6.75 ± 1.73	6.94 ± 1.67	7.14 ± 1.58* †	6.92 ± 1.82	0.003
Marital status, %					0.001
Married	77.9	84.4	87.1	79.7
Not married	22.1	15.6	12.9	20.3
Education, %					0.004
High school or below	28.5	21.7	17.2	23.1
Some college/college	39.0	39.7	42.9	41.0
Some graduate/graduate	32.6	38.6	39.9	35.8
Number of alcoholic beverages per week	4.78 ± 8.06	3.91± 6.19	4.67 ± 6.74	4.91 ± 7.34	0.012
Smoking, %	4.4	1.6	1.7	0.9	0.005
Physical Activity, mean	140.92 ± 74.03	150.07 ± 72.37	139.87 ± 68.28†	138.99 ± 67.70*	0.003
BMI, mean	29.24 ± 4.66	27.06 ± 3.63*	26.54 ± 3.41* †	26.87 ± 3.55*	< 0.001
Depression (GDS ≥ 6), %	7.6	5.4	7.8	7.5	0.112
Comorbidity
Diabetes, %	17.7	12.9	12.5	13.2	0.091
Pulmonary/lung disease, %	7.6	5.2	4.0	4.7	0.105
CHF, %	11.0	5.6	5.5	2.4	< 0.001
HTN, %	57.6	49.2	49.0	49.5	0.035
Heart attack, MI, %	21.8	15.7	19.3	18.4	0.023
Angina, %	19.5	14.7	15.6	11.8	0.069
Benzodiazepine, %	4.4	3.1	4.9	2.8	0.231
SSRI, %	3.3	3.2	2.0	5.1	0.200

Abbreviations: BMI, body mass index; GDS, geriatric depression scale, congestive heart failure; HTN, hypertension; MI, myocardial infarction; SSRI, selective serotonin reuptake inhibitors

n = 2,861 for smoking, physical activity, BMI, comorbidities (diabetes, pulmonary/lung disease, CHF, HTN, MI, and angina), Benzodiazepine, and SSRI, n = 2,860 for alcohol use, n = 2,859 for depression, n = 2,851 for subjective social status

^*P < 0.05 compared with total sleep time <5 hours,

^†compared with total sleep time 5 to < 7 hours