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The present study examined the relationship of anxiety sensitivity, dysfunctional beliefs about sleep and neuroticism on sleep disturbance. Previous research of these three related concepts-each describing a different kind of reactivity to interoceptive or environmental events-have served as predictors of insomnia and insomnia-related distress; however, it is not known how these concepts have distinctive prediction of sleep outcomes. We completed an Internet survey of 149 undergraduate student participants, a population with elevated risk for disturbed sleep. Participants completed a demographics questionnaire, the Anxiety Sensitivity Index (ASI), the Dysfunctional Beliefs and Attitudes about Sleep Scale (DBAS-16), the NEO Five-Factor Inventory, and the Pittsburgh Sleep Quality Index (PSQI). Results revealed a significant association between PSQI total score and the three variables of interest, ASI, DBAS, and neuroticism. However, in a stepwise regression, neuroticism was the statistically most important predictor of sleep disturbance. The DBAS was a statistically more important predictor than ASI total score; however, when the ASI was examined by subscale, DBAS was replaced in the model by the ASI Mental Incapacitation Concerns subscale. Our findings highlight the continued value of higher order concepts like neuroticism in the development of disorder-specific measures like the DBAS, as well as indicate that distress in response to cognitive symptoms (AS-mental incapacitation) may play a role in maintaining sleep dysfunction.
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