Table 1.

Mean Daytime Epworth Sleepiness Scale Score Versus Other Sleep and Symptom Scale Scores in 26 Veterans With Posttraumatic Stress Disorder (PTSD) and Sleep Disturbance^a

	Correlation With Mean Epworth Sleepiness Scale Score
Variable	Pearson r	Probability
Actigraphic findings
Sleep duration, mean	0.13	.55
Awakenings, mean	–0.32	.14
Sleep log
Sleep duration, mean	0.30	.15
Awakenings, mean	0.06	.72
Pittsburgh Sleep Quality Scale score
Total	–0.03	.88
Daytime dysfunction	0.67	< .001
Sleep medication use	–0.48	.02
Sleep disturbance	0.30	.15
Subjective sleep quality	0.14	.50
Sleep latency	0.12	.58
Habitual sleep efficiency	–0.06	.78
Symptom score
PTSD Checklist, total	0.40	.05
PTSD Checklist, hypervigilance	0.44	.03
PTSD Checklist, avoidance	0.34	.09
PTSD Checklist, reexperiencing	0.34	.09
Clinician Administered PTSD Scale, current	0.36	.09
Beck Depression Inventory	0.37	.06

^aBolded values indicate statistical significance.