Relationships among socioeconomic status, stress induced changes in cortisol, and blood pressure in african american males |
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Authors: | Gaston K Kapuku MD PhD Frank A Treiber PhD Harry C Davis MS |
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Institution: | (1) Medical College of Georgia, Georgia Prevention Institute, Building HS1640, 30912-3710 Augusta, GA |
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Abstract: | The inverse relation between socioeconomic status (SES) and cardiovascular disease (CVD) risk has been posited to be partially
due to exaggerated cardiovascular reactivity (CVR) to stress. Stress elicits hypothalamic-pituitary-adrenal axis activation
(e.g., increased cortisol secretion), which may contribute to subsequent blood pressure (BP) elevation. Univariate associations
among SES, cortisol secretion, and aggregated change scores to stressors (i.e., video game and forehead cold) for systolic
BP (SBP) and diastolic BP (DBP) were assessed in a sample of 24 African American males (M age = 18.8, ± 2.7 years). Circadian
variability of cortisol level was taken into account by partialling out collection time. Family SES was inversely related
to initial cortisol level (partial r = -.46, p < .03). Neighborhood SES was inversely related to DBP reactivity (r = -.41,
p < .05). The change in cortisol level during the stressor protocol was related to SBP reactivity (partial r = .44, p < .05).
These results suggest that SES may be linked to CVD via BP and cortisol reactivity to stress, but prospective studies are
needed to clarify whether such is the case.
Preparation of this article was supported in part by Grants HL 69999 and HL 41781 from the National Institutes of Health. |
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