Table 2. Sleep scores in African Americans and Whites in MARS and MAP.

	Total Sample (N=943)	African Americans (n=452)	Whites (n=491)	P
Sleep quality total score	6.02 (2.79)	6.17 (2.99)	5.89 (2.59)	.002
Latency	1.12 (.95)	1.10 (.98)	1.14 (.93)
Duration	.55 (.86)	.72 (.96)	.38 (.07)
Efficiency	.86 (1.06)	1.08 (1.13)	.65 (.95)
Disturbance	2.30 (.95)	2.13 (.99)	2.45 (.88)
Sleepiness	1.16 (.60)	1.13 (.57)	1.20 (.62)
Medication	.04 (.19)	.01 (.09)	.06 (.24)
Sleep apnea risk score				NS
Snore category	.82 (.38)	.81 (.39)	.83 (.37)
Fatigue category	.44 (.49)	.38 (.49)	.50 (.50)
Physiological category	.78 (.041)	.88 (.33)	.69 (.46)
Category sum	1.44 (.78)	1.49 (.74)	1.38 (.82)
Restless leg syndrome (RLS)
Possible RLS, n	246	117	129
RLS symptom count	4.43 (1.90)	4.46 (1.97)	4.41 (1.85)	NS
REM sleep behavior disorder (RBD)
Possible RBD, n	64	38	26
RBD symptom count	1.06 (.92)	1.13 (1.01)	.96 (.77)	NS

Data are mean (SD) unless noted otherwise.

MARS, Minority Aging Research Study 2004-2014, Chicago; MAP, Memory and Aging Project 1997-2014, Chicago; NS, not significant at P<.05.