SLEEP 2011 Abstract Supplement

B. Clinical Sleep Science IV. Sleep Disorders – Parasomnias
Conclusion: Both periodic and non-periodic leg movements may be
the potential triggers for confusional arousals in children with history
of parasomnias.
0574
FEAR OF SLEEP IN TRAUMA-EXPOSED ADULTS WITH
CHRONIC NIGHTMARES
Pruiksma KE 1,2 , Cranston C 1 , Jaffe A 1 , Davis J 1
1
Psychology Department, The University of Tulsa, Tulsa, OK, USA,
2
Southern Arizona VA Healthcare System, Tucson, AZ, USA
Introduction: Posttraumatic stress symptoms, including nightmares and
insomnia, are commonly experienced subsequent to traumatic events. It
has been hypothesized that fear of sleep plays a role in these symptoms.
Limited research has examined the relationships between trauma exposure,
fear of sleep, and posttraumatic stress symptoms.
Methods: Forty-one trauma-exposed adults seeking treatment for
chronic nightmares completed measures assessing fear of sleep, PTSD,
nightmares, insomnia, and sleep hygiene. Fifty-four percent met criteria
for PTSD (n = 22).
Results: Pearson product-moment correlations revealed significant relationships
between fear of sleep and nightmare frequency (r = .50, p
= 0.001), nightmare severity (r = .47, p < 0.05), PTSD severity (with
nightmare and sleep items removed; r = .66, p < 0.001), insomnia severity
(r = .46, p < 0.05), and poor sleep hygiene (r = .34, p < 0.05). Hierarchical
regression examined if nightmares predict fear of sleep after
controlling for PTSD. The total PTSD score (with nightmare and sleep
items removed) was entered at Step 1, explaining 41.0% of the variance
in fear of sleep. After entry of nightmare frequency and severity at Step
2, the total variance explained was 46.8 %, F (3, 37) = 9.98, p < .001.
Nightmares explained an additional 6.1% of the variance in fear of sleep
after controlling for PTSD, R square change = .06, F change (2, 34) =
1.94, p = .16. In the final model, only PTSD severity was a statistically
significant predictor of fear of sleep.
Conclusion: In a sample of chronic nightmare sufferers with and without
PTSD, nightmares did not explain a significant amount of variance
in fear of sleep after controlling for PTSD symptoms. This suggests fear
of sleep is associated with a broader reaction to trauma than nightmares
alone. Data collection is in progress and analyses with full data will be
presented.
0575
ACTIGRAPHY FOR ASSESSMENT OF REM SLEEP
BEHAVIOR DISORDER IN PARKINSON’S DISEASE
Maglione JE 1 , Neikrug AB 1,2 , Natarajan L 3 , Liu L 1 , Avanzino JA 4 ,
Calderon J 4 , Lawton SE 4 , Corey-Bloom J 5 , Loredo JS 6 , Ancoli-Israel S 1
1
Psychiatry, University of California, San Diego, San Diego, CA, CA,
USA, 2 Joint Doctoral Program in Clinical Psychology, University of
California San Diego and San Diego State University, San Diego, CA,
USA, 3 Family and Preventative Medicine, University of California,
San Diego, La Jolla, CA, USA, 4 Psychiatry, Veterans Affairs Medical
Center, La Jolla, CA, USA, 5 Neurology, University of California, San
Diego, La Jolla, CA, USA, 6 Medicine, University of California, San
Diego, La Jolla, CA, USA
Introduction: REM sleep behavior disorder (RBD) is a common cause
of sleep disruption in Parkinson’s disease (PD). A small study recently
evaluated actigraphy as a tool to assess RBD symptoms in PD patients
and reported that having RBD, defined by RBD Screening Questionnaire
(RBDSQ) score, was associated with increased number of actigraphically
recorded wake bouts. Our goal was to further investigate
this association in a larger sample using both objective and subjective
measures to assess RBD.
Methods: 41 PD patients (27 men; mean 67.3 years) underwent simultaneous
objective and subjective assessment for RBD by overnight PSG
(REM without atonia; EMGscore=average tonic and phasic REM activ-
ity) and RBDSQ. Patients wore an actigraph (MiniMitter/Respironics
Inc). Sleep/wake variables were calculated (Actiware 5.0) at three sensitivity
thresholds (20, 40, and 80 activity counts/epoch). Patients were
classified either yes-RBD (n=18; PSGscore≥10% plus RBDSQ≥5 or
observed RBD), no-RBD (n=13; EMGscore