Is type A behavior really a trigger for coronary heart disease events?

The purpose of this study was to compare chronic with acute mechanisms by which Type A might predict incident coronary heart disease (CHD). The study included 2394 men aged 50 to 64 years who were assessed for CHD, Type A behavior, and CHD risk factors. Type A was assessed using the Jenkins Activity...

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Bibliographic Details
Published inPsychosomatic medicine Vol. 65; no. 3; p. 339
Main Authors Gallacher, John E J, Sweetnam, Peter M, Yarnell, John W G, Elwood, Peter C, Stansfeld, Stephen A
Format Journal Article
LanguageEnglish
Published United States 01.05.2003
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Summary:The purpose of this study was to compare chronic with acute mechanisms by which Type A might predict incident coronary heart disease (CHD). The study included 2394 men aged 50 to 64 years who were assessed for CHD, Type A behavior, and CHD risk factors. Type A was assessed using the Jenkins Activity Survey (JAS), the Bortner scale, and the Framingham scale. Further examinations were completed at 5 and 9 years for incident CHD. After 9 years, there was no increased risk of CHD associated with any Type A score. Nevertheless, high Bortner scores were associated with increased risk of incident CHD at 5 years and high JAS and Bortner scores were associated with a decreased risk between 5 and 9 years. Further analysis of Type A scores on time to first coronary event found strong inverse associations for all type A scores (JAS = 205 -0.49 months to first event, 95% CI = -0.20, -0.78, p =.001) (Bortner = 176 -0.27 months; 95% CI = -0.10, -0.44; p =.002) (Framingham = 0.44 -0.0011 months; 95% CI = -0.0002, -0.0019; p =.01). The data show Type A is a strong predictor of when incident coronary heart disease (or coronary event) will occur rather than if it will occur. These findings suggest that Type A increases exposure to potential triggers, rather than materially affecting the process of atherosclerosis.
ISSN:1534-7796
DOI:10.1097/01.PSY.0000041608.55974.A8