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BioMed Research International
Volume 2013 (2013), Article ID 246035, 7 pages
http://dx.doi.org/10.1155/2013/246035
Research Article

Age-Related Differences in the Effect of Psychological Distress on Mortality: Type D Personality in Younger versus Older Patients with Cardiac Arrhythmias

1Center of Research on Psychology in Somatic Diseases (CoRPS), Department of Medical and Clinical Psychology, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, The Netherlands
2Department of Methodology and Statistics, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, The Netherlands
3Department of Cardiology, Catharina Hospital, Eindhoven, The Netherlands
4Department of Cardiology, Amphia Hospital, Breda, The Netherlands
5GGz Breburg, Tilburg, The Netherlands

Received 24 April 2013; Accepted 19 August 2013

Academic Editor: David Maintz

Copyright © 2013 Johan Denollet et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Mixed findings in biobehavioral research on heart disease may partly be attributed to age-related differences in the prognostic value of psychological distress. This study sought to test the hypothesis that Type D (distressed) personality contributes to an increased mortality risk following implantable cardioverter defibrillator (ICD) treatment in younger patients but not in older patients. Methods. The Type D Scale (DS14) was used to assess general psychological distress in 455 younger (≤70 y, ) and 134 older (>70 y, ) ICD patients. End points were all-cause mortality and cardiac death after a median follow-up of 3.2 years. Results. Older patients had more advanced heart failure and a higher mortality rate ( %) than younger patients ( %), . Cardiac resynchronization therapy (CRT), but not Type D personality, was associated with increased mortality in older patients. Among younger patients, however, Type D personality was associated with an adjusted hazard ratio = 1.91 (95% CI 1.09–3.34) and 2.26 (95% CI 1.16–4.41) for all-cause and cardiac mortality; other predictors were increasing age, CRT, appropriate shocks, ACE-inhibitors, and smoking. Conclusion. Type D personality was independently associated with all-cause and cardiac mortality in younger ICD patients but not in older patients. Cardiovascular research needs to further explore age-related differences in psychosocial risk.