Effect of Type A behavior on exercise test outcome in coronary artery disease.

Siegel WC, Hlatky MA, Mark DB, Barefoot JC, Harrell FE, Pryor DB, Williams RB
Am J Cardiol. 1990 66 (2): 179-82

PMID: 2196775 · DOI:10.1016/0002-9149(90)90584-n

The outcome of the diagnostic exercise test depends on such patient-related factors as age, maximum exercise heart rate, exercise time and severity of the underlying coronary artery disease (CAD). This study examined the hypothesis that type A behavior would affect the amount of effort expended, as indicated by the exercise time and the maximum heart rate achieved, thereby resulting in differences in exercise test outcome. A total of 1,260 patients with suspected CAD, all of whom had coronary angiography, a structured interview to assess type A behavior and a treadmill exercise test, participated. Of these patients, 818 (65%) had significant CAD, and 852 (68%) were type A. There were no differences between type A and B patients in either maximum heart rate or total exercise time. Among both type A and B subjects, 36% of treadmill tests were positive. Exercise test sensitivity was similar for both groups (69% for type A vs 72% for type B, p = 0.39). Similarly, specificity was similar for both groups (87% for type A vs 80% for type B, p = 0.09). Results did not change after using logistic regression to control for potential confounding factors. Thus, type A behavior does not need to be taken into account when interpreting exercise test outcome.

MeSH Terms (12)

Adult Aged Coronary Disease Electrocardiography Exercise Test Female Heart Rate Humans Male Middle Aged Sensitivity and Specificity Type A Personality

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