Background: Sleep deprivation has been shown to improve depressive sym
ptoms in some patients with major depressive disorder, but it has not
been tested in patients with generalized anxiety disorder (GAD) or soc
ial phobia (SP). Methods: To determine if sleep deprivation altered an
xiety or depressive symptoms in patients with GAD (n = 7) or SP (n = 8
), we sleep deprived patients and normal controls (n = 18) for one nig
ht. Results: Out one measure of anxiety, GAD patients improved compare
d with controls, but there were otherwise no significant change differ
ences between controls and SP or GAD patients. Conclusions: The lack o
f benefit is consistent with previous findings that sleep deprivation
provides no benefit to patients with other anxiety disorders. Sleep de
privation may be a biological intervention that distinguishes anxiety
from affective disorders. (C) 1998 Society of Biological Psychiatry.