Type A eagerness-energy across developmental periods predicts adulthood carotid intima-media thickness: the Cardiovascular Risk in Young Finns Study.

OBJECTIVE We examined the Type A behavior across developmental periods as a predictor of adult carotid artery intima-media thickness (IMT). METHODS AND RESULTS In this prospective cohort study of 408 men and 606 women, socioeconomic background and biological risk factors of participants were assessed at baseline at age 6 to 18 years of age, Type A behavior (Hunter-Wolf A-B Rating Scale) at the 6-, 9-, and 21-year follow-ups (subjects being 12 to 24, 15 to 27, and 27 to 39 years, respectively), and carotid IMT, adulthood socioeconomic situation, and biological risk factors at the 21-year follow-up when participants were at age 27 to 39 years of age. In men, the eagerness-energy component of Type A behavior, measured at any time point, was associated with thicker carotid IMT (P<0.008, P<0.04, P<0.03, and P<0.02 for the first, second, and third assessment, and for the average score, respectively), and this association was independent of early and adult risk factors. In women, the hard-driving component at baseline (P<0.04) but not later was independently related to thinner carotid IMT. The other components of Type A behavior (impatience-aggression and leadership) were not associated with IMT. CONCLUSIONS Eagerness-energy component of Type A behavior over different developmental transitions seems to be a robust predictor of IMT in men.