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Psychophysiological Reactivity and Coping Styles Influence the Effects of Acute Stress Exposure on Rapid Eye Movement Sleep

From the Departments of Psychiatry (A.G., D.J.B., H.O., D.J.K., M.H.) and Statistics (H.O.), School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.

View larger version (10K): [in a new window]   Fig. 1. Proposed models of the mediation and moderation of REM sleep parameters after acute stress exposure.

View larger version (27K): [in a new window]   Fig. 2. Interaction between stress exposure (control vs. experimental) and REM sleep period for automated average REM counts. Error bars represent standard deviations.

View larger version (13K): [in a new window]   Fig. 3. Moderated mediation of the effects of stress exposure on late-night average RC. Subjective stress ratings mediate the effects of acute stress exposure on late-night average RC. Subjective stress ratings, in turn, are partially determined by the interaction between stress exposure and seeking social support as a way of coping.

View larger version (9K): [in a new window]   Fig. 4. Partial mediation of REML by changes in presleep state anxiety. Changes in state anxiety predict REML. Changes in state anxiety, in turn, are partially moderated by the interactions between stress exposure and seeking social support, and the interaction between stress exposure and avoidance.