Low CD4+ T-cell count as a major atherosclerosis risk factor in HIV-infected women and men - PubMed (original) (raw)
Low CD4+ T-cell count as a major atherosclerosis risk factor in HIV-infected women and men
Robert C Kaplan et al. AIDS. 2008.
Abstract
Objective: To assess the association of HIV infection, HIV disease parameters (including CD4+ T-cell counts, HIV viral load, and AIDS) and antiretroviral medication use with subclinical carotid artery atherosclerosis.
Design: Cross-sectional study nested within a prospective cohort study.
Methods: Among participants in the Women's Interagency HIV Study (1331 HIV-infected women, 534 HIV-uninfected women) and Multicenter AIDS Cohort Study (600 HIV-infected men, 325 HIV-uninfected men), we measured subclinical carotid artery lesions and common carotid artery intima-media thickness using B-mode ultrasound. We estimated adjusted mean carotid artery intima-media thickness differences and prevalence ratios for carotid lesions associated with HIV-related disease and treatments, with multivariate adjustment to control for possible confounding variables.
Results: Among HIV-infected individuals, a low CD4+ T-cell count was independently associated with an increased prevalence of carotid lesions. Compared with the reference group of HIV-uninfected individuals, the adjusted prevalence ratio for lesions among HIV-infected individuals with CD4+ T-cell count less than 200 cells/mul was 2.00 (95% confidence interval, 1.22-3.28) in women and 1.74 (95% confidence interval, 1.04-2.93) in men. No consistent association of antiretroviral medications with carotid atherosclerosis was observed, except for a borderline significant association between protease inhibitor use and carotid lesions in men (with no association among women). History of clinical AIDS and HIV viral load were not significantly associated with carotid atherosclerosis.
Conclusion: Beyond traditional cardiovascular disease risk factors, low CD4+ T-cell count is the most robust risk factor for increased subclinical carotid atherosclerosis in HIV-infected women and men.
Figures
Figure. Mean CIMT (A) and prevalence of carotid lesions (B), with 95% confidence intervals, by age, HIV status, and sex
CIMT, carotid intima-media thickness Sample sizes for each age/sex/HIV group shown at the top. (A) Unadjusted mean CIMT was 722 μm in HIV-infected women, 716 μm in HIV-uninfected women, 750 μm in HIV infected men, and 771 μm in HIV-uninfected men. Y axis: CIMT in μm (B) Carotid lesions defined as focal intima-media thickness >1.5 mm in any segment of the right common carotid artery, internal carotid artery, or carotid bulb. Unadjusted prevalence of lesions was 10% in HIV-infected women, 6% in HIV-uninfected women, 28% in HIV-infected men, and 30% in HIV-uninfected men. Y axis: prevalence of lesions
Comment in
- Increased cardiovascular risk in HIV infection: drugs, virus and immunity.
Murphy R, Costagliola D. Murphy R, et al. AIDS. 2008 Aug 20;22(13):1625-7. doi: 10.1097/QAD.0b013e328306a6db. AIDS. 2008. PMID: 18670222 No abstract available.
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