Abstract 584: The Association of Psychosocial Risk Factors with Subclinical Atherosclerosis in South Asians
Objective: South Asians (individuals from India, Pakistan, Bangladesh, Nepal, and Sri Lanka) are at higher risk of cardiovascular disease (CVD) than other ethnic groups, however this increased risk cannot be explained by traditional risk factors. We investigated the association of psychosocial risk factors with carotid intima media thickness (cIMT), a measure of subclinical CVD, in a community-based cohort of South Asians living in the United States.
Methods: A total of 906 individuals from the Mediators of Atherosclerosis in South Asians Living in America (MASALA) Study, aged 40-83, were included in this cross-sectional analysis. High resolution B-mode ultrasonography was used to measure right and left common cIMT (CCA) and internal cIMT (ICA). Linear regression analyses were done to test the associations of the following psychosocial variables: anger, anxiety, depressive symptoms, current and prior 6-month life stress, social support, and everyday hassles with CCA and ICA. In a multivariable model, results were adjusted for the following traditional CVD risk factors: age, sex, systolic blood pressure, hypertension medication use, education, physical activity, diabetes, BMI, smoking, and total/HDL cholesterol ratio. Interaction effects between sex and psychosocial variables were also tested.
Results: In age- and sex- adjusted analyses, current life stress and life stress over the past 6 months were positively associated with CCA [mean difference per 1-SD increase (CI) was 0.014 (0.001-0.028; p=0.042) and 0.015 (0.001-0.029; p=0.031), respectively], but were no longer significant after adjusting for other CVD covariates. There was a significant sex interaction with anxiety (p=0.044). Among men, anxiety was positively associated with CCA [mean difference per 1-SD increase (CI) was 0.021 (0.001-0.041; p=0.04) in age-adjusted analyses, and 0.022 (0.002-0.042; p=0.031) in a fully adjusted model]. ICA was not associated with any psychosocial factor.
Conclusion: Compared to results in other ethnic groups, there was no significant association between trait anger and cIMT in South Asians. Anxiety was associated with CCA independent of traditional CVD risk factors in men alone.
Author Disclosures: B. Shah: None. S. Shah: None. N. Kandula: None. A. Kanaya: Research Grant; Modest; NIH grant #1R01 HL093009, NIH/ NCRR UCSF-CTSI Grant Number UL1 RR024131.
- © 2015 by American Heart Association, Inc.