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

Published in final edited form as: J Trauma Stress. 2009 Dec;22(6):643–647. doi: 10.1002/jts.20464

Table 1.

Means, Standard Deviations, and Difference Statistics for Actigraphy and BRS scores

Sleep Parameters	PTSD (n = 32)		Control (n = 21)
	M	(SD)	M	(SD)	F (1, 51)
Time in bed (minutes)	487.62	(72.40)	449.10	(60.50)	4.07^*
Total sleep time (minutes)	376.56	(76.38)	375.56	(51.62)	< 1.00
Wake after sleep onset (minutes)	64.71	(24.71)	48.57	(22.17)	5.86^*
Wake after sleep onset percent	14.87	(6.45)	11.65	(4.05)	4.16^*
Sleep efficiency (%)	77.37	(11.10)	83.95	(5.67)	6.27^*
Sleep onset latency (minutes)	26.72	(28.72)	10.32	(10.67)	6.25^*
Fragmentation index	35.79	(13.65)	27.66	(8.22)	6.01^*
Baroreceptor sensitivity (BRS)	11.83	(6.15)	21.74	(15.73)	10.38^**

p < .05.

^**

p < .01.