Psychosomatic Medicine

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Psychosomatic Medicine:
doi: 10.1097/01.psy.0000221360.94700.16
Original Articles

Chronic Exposure to Everyday Discrimination and Coronary Artery Calcification in African-American Women: The SWAN Heart Study

Lewis, Tené T. PhD; Everson-Rose, Susan A. PhD; Powell, Lynda H. PhD; Matthews, Karen A. PhD; Brown, Charlotte PhD; Karavolos, Kelly MA; Sutton-Tyrrell, Kim DrPH; Jacobs, Elizabeth MD; Wesley, Deidre MPA

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Background: Emerging evidence suggests that exposure to discrimination may be associated with atherosclerosis in African-American women, although research in this area focused on short-term rather than chronic exposure to discriminatory events.

Methods: We examined the relationship between chronic exposure to multiple types of discrimination (self-reported and averaged over 5 years) and coronary artery calcification (CAC) in a sample of 181 middle-aged African-American women. Discrimination was assessed at each time point, and the presence/absence of CAC was assessed at the fifth annual follow-up examination by electron beam tomography. We hypothesized that chronic discrimination would be more strongly associated with CAC than recent discrimination and that racial/ethnic discrimination would be more strongly associated with CAC than other types of discrimination.

Results: Chronic exposure to discrimination was significantly associated with the presence of CAC in unadjusted logistic regression analyses (p = .007) and after adjustment for demographics (p = .01), standard cardiovascular risk factors (p = .02), and Body Mass Index (BMI) (p = .05). In contrast, recent discrimination was only marginally associated with the presence of CAC in both unadjusted (p = .06) and fully adjusted logistic regression models (p = .08). Persistent exposure to racial/ethnic discrimination was not more strongly associated with CAC compared with other types of discrimination in either unadjusted or adjusted models.

Conclusion: Chronic exposure to discrimination may be an important risk factor for early coronary calcification in African-American women. This association appears to be driven by exposure to discrimination from multiple sources, rather than exposure to racial/ethnic discrimination alone.

CVD = cardiovascular disease; CAC = coronary artery calcification; SWAN = Study of Women’s Health Across the Nation; EBT = electron beam tomographic; CES-D = Center for Epidemiological Studies Depression; BMI = body mass index; FRS = Framingham Risk score; HDL-c = high density lipoprotein cholesterol; CRP = C-reactive protein; OR = odds ratio; CI = confidence interval; IMT = intima-media thickness.

Copyright © 2006 by American Psychosomatic Society

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