. Author manuscript; available in PMC: 2010 Jun 1.

Published in final edited form as: Sleep Med. 2008 Nov 7;10(6):664–667. doi: 10.1016/j.sleep.2008.05.011

Table 1. Characteristics of the Sample Stratified by Ethnicity.

Variable	African American (mean ± SE)	European American (mean ± SE)	F	p
Age (years)	65.64 ± 1.15	70.11 ± 1.08	8.05	.01
Body Mass Index (kg/m²)	30.45 ± 1.10	25.28 ± 1.04	11.75	.01
Geriatric Depression Scale	7.44 ± .92	8.46 ± .87	.65	.42
Relationship Style Questionnaire	78.64 ± 2.92	73.50 ± 2.76	1.63	.21
Subjective Sleep Duration (hours)	5.83 ± .24	6.53 ± .22	4.67	.04
Pittsburgh Sleep Quality Index	4.81 ± .71	4.89 ± .63	.15	.71