Coping processes and hemostatic reactivity to acute stress in dementia caregivers

Background: A hypercoagulable stress response might contribute to the increased cardiovascular risk in Alzheimer's caregivers. Objectives: (1) To evaluate whether coping processes affect hemostatic reactivity to acute psychological stress and (2) whether these effects differ substantially between caregivers and noncaregivers. Methods: Sixty elderly community-dwelling spousal caregivers of patients with Alzheimer's disease and 33 noncaregiving controls completed the revised Ways of Coping Questionnaire to assess approach/problem-solving versus avoidant coping processes. Participants were administered an acute stress test that required them to deliver a 3-minute speech challenge to the inter-viewer on an assigned topic. The hypercoagulability marker D-dimer was measured at three time points: baseline, immediately postspeech, and during recovery (15 minutes postspeech). Results: Multivariate analysis of covariance revealed that subjects who endorsed greater levels of approach coping had decreased levels of D-dimer at all time points (p = .048). A significant three-way interaction between planful problem solving, caregiver status, and the temporal pattern of D-dimer was found (p = .004), indicating that caregivers with low levels of planful problem solving exhibited greater increases in D-dimer from baseline to speech and recovery time points relative to controls. No relationship between avoidant coping and D-dimer was found. Conclusions: These findings suggest the possibility that approach and problem-solving coping processes buffer the impact of acute psychological stressors on procoagulant activity. It remains to be seen whether interventions that increase approach/problem-solving processes might produce salutary effects among caregiving populations.