Table 2.

Sleep Self Report Diary and Objective Actigraphy Measures of Nappers vs. Non-Nappers (N=54)

	Non-Nappers (n=37)		Nappers (n=17)
	Mean	(SD)	Mean	(SD)	P value
Self-report variables
Awakenings last night	0.70	(0.67)	0.78	(0.60)	0.68
Tired upon awakening	1.64	(0.66)	1.61	(0.65)	0.88
Sleepy upon awakening	1.68	(0.60)	1.65	(0.52)	0.85
Alert upon awakening	1.62	(0.78)	1.50	(0.75)	0.61
sleep quality	3.24	(0.53)	3.16	(0.63)	0.63
Actigraphy variables
sleep onset	22.35	(0.83)	23.09	(1.33)	0.04*
sleep offset	7.36	(0.85)	7.52	(0.87)	0.52
total sleep, min	465.47	(41.22)	437.60	(54.42)	0.04*
sleep onset variability	0.64	(0.36)	1.08	(0.53)	<0.01*
sleep offset variability	0.71	(0.44)	0.76	(0.52)	0.67
total sleep variability, min	45.51	(24.72)	56.57	(30.01)	0.16