Coronary-prone behaviors in the Western Collaborative Group Study.

Area of Science:

• Cardiology
• Behavioral Science
• Epidemiology

Background:

• The Type A behavior pattern has been linked to coronary heart disease (CHD).
• Specific behavioral components contributing to this association require further elucidation.
• Previous research suggests a correlation between certain Type A traits and increased CHD risk.

Purpose of the Study:

• To prospectively investigate the relationship between specific behavioral dimensions of the Type A behavior pattern and the incidence of coronary heart disease (CHD).
• To identify which components of the Type A behavior pattern are significant predictors of CHD.

Main Methods:

• Utilized data from 250 CHD cases and 500 matched controls from the Western Collaborative Group Study.
• Administered Type A structured interviews at intake and reevaluated 12 operationally defined behavioral components.
• Employed matched logistic regression models for univariate and multivariate risk analyses.

Main Results:

• Univariate analyses revealed significant associations between hostility, speaking rate, immediateness, competitiveness, and Type A content with CHD incidence.
• In multivariate analysis including all 12 components, only hostility remained a significant predictor of CHD.
• Hostility demonstrated a robust relative risk (RR = 1.93, p < 0.001) for CHD incidence.

Conclusions:

• The Type A behavior pattern includes both benign and coronary-prone facets.
• Hostility is the most significant behavioral component associated with an increased risk of coronary heart disease.
• Behavioral interventions targeting hostility may be crucial in CHD prevention strategies.