International Journal of Behavioral Medicine

, Volume 5, Issue 3, pp 213–229 | Cite as

Classification of individual differences in cardiovascular responsivity: The contribution of reactor type controlling for race and gender

  • Maria M. Llabre
  • Beth R. Klein
  • Patrice G. Saab
  • Judith B. McCalla
  • Neil Schneiderman


Classification of 150 normotensive or mildly hypertensive men and women into myocardial, vascular, or mild reactors was accomplished using a regression-based approach. The method was based on the participants’ cardiac output (CO) and total peripheral resistance (TPR) reactivity to the speech presentation task. This task purportedly can elicit both myocardial and vascular responses. Cut-scores were based on the v-intercept from the linear regression of the CO reactivitv on TPR reactivity and vice versa. A greater percentage of Black men were classified as vascular responders as compared to Black women and White participants. Groups were found to differ on cardiovascular reactivity to the speech preparation, cold pressor, and mirror tracing tasks in predictable ways, after controlling for gender and ethnicity. Groups were also differentiated by ambulatory blood pressure and hypertensive status. The study supports the classification of homogeneous groups of participants based on the relative extent to which myocardial or vascular mechanisms dominate the reactivity to stress.

Key words

cardiovascular reactivity reactor types individual response stereotypy 


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Copyright information

© International Society of Behavioral Medicine 1998

Authors and Affiliations

  • Maria M. Llabre
    • 1
  • Beth R. Klein
    • 2
  • Patrice G. Saab
    • 1
  • Judith B. McCalla
    • 1
  • Neil Schneiderman
    • 1
  1. 1.Behavioral Medicine Research Center and Department of PsychologyUniversity of MiamiMiamiUSA
  2. 2.Department of PsychologyGeorgia State UniversityAtlantaUSA

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