SLEEP 2011 Abstract Supplement

B. Clinical Sleep Science III. Sleep Disorders – Insomnia
0528
A PILOT RANDOMIZED CLINICAL EFFECTIVENESS TRIAL
OF GROUP COGNITIVE-BEHAVIORAL THERAPY FOR
INDIVIDUALS WITH PERSISTENT INSOMNIA FROM THE
WISCONSIN SLEEP COHORT STUDY
Rumble M 1 , Guo M 1 , Phelan CH 1,2 , Peppard PE 1 , Benca R 1
1
University of Wisconsin, Madison, WI, USA, 2 William S. Middleton
Memorial Veterans Hospital, Madison, WI, USA
Introduction: Cognitive-behavioral therapy (CBT) for insomnia has
been shown to be effective for primary and co-morbid insomnia. However,
studies have mainly used clinic-based samples. The current study
examined the effectiveness of CBT for individuals with persistent insomnia
from the Wisconsin Sleep Cohort Study (WSCS), a 20+ year
epidemiological study of sleep.
Methods: 17 participants (mean age=64.1;SD=7.1) were enrolled from
a sub-sample of 179 participants endorsing insomnia symptoms and
recruited by letter from the WSCS. Patients underwent screening, met
research diagnostic criteria for insomnia, completed baseline questionnaires
and sleep logs, were randomized to either group CBT (n=8) or
treatment as usual (TAU;n=9), and completed post-test questionnaires
and sleep logs. Outcomes included questionnaire assessment of insomnia
symptoms, dysfunctional sleep-related beliefs, sleep inhibitory behaviors,
depression, and worry. Sleep log outcomes were sleep onset
latency, wake time after sleep onset, and total sleep time. Group CBT
included stimulus control, sleep restriction, relaxation, and cognitive
strategies in 6 1-hour-long sessions over approximately 6 weeks. Analyses
included repeated measures ANOVA and chi-square analysis for
continuous and categorical variables, respectively.
Results: The CBT group demonstrated significantly greater improvement
in insomnia symptoms than the TAU group (F(1,15)=6.4,p=.02).
Moreover, 50% of the CBT group reached an Insomnia Symptom
Severity cut-off of =50% and LPS