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National Institute of Environmental Health Sciences

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Publication Detail

Title: Does an index composed of clinical data reflect effects of inflammation, coagulation, and monocyte activation on mortality among those aging with HIV?

Authors: Justice, Amy C; Freiberg, Matthew S; Tracy, Russ; Kuller, Lew; Tate, Janet P; Goetz, Matthew Bidwell; Fiellin, David A; Vanasse, Gary J; Butt, Adeel A; Rodriguez-Barradas, Maria C; Gibert, Cynthia; Oursler, Kris Ann; Deeks, Steven G; Bryant, Kendall; VACS Project Team

Published In Clin Infect Dis, (2012 Apr)

Abstract: When added to age, CD4 count and human immunodeficiency virus type 1 (HIV-1) RNA alone (Restricted Index), hemoglobin, FIB-4 Index, hepatitis C virus (HCV), and estimated glomerular filtration rate improve prediction of mortality. Weighted and combined, these 7 routine clinical variables constitute the Veterans Aging Cohort Study (VACS) Index. Because nonroutine biomarkers of inflammation (interleukin 6 [IL-6]), coagulation (D-dimer), and monocyte activation (sCD14) also predict mortality, we test the association of these indices and biomarkers with each other and with mortality.Samples from 1302 HIV-infected veterans on antiretroviral therapy were analyzed. Indices were calculated closest to date of collection. We calculated Spearman correlations stratified by HIV-1 RNA and HCV status and measured association with mortality using C statistics and net reclassification improvement (NRI).Of 1302 subjects, 915 had HIV-1 RNA <500 copies/mL and 154 died. The VACS Index was more correlated with IL-6, D-dimer, and sCD14 than the Restricted Index (P < .001). It was also more predictive of mortality (C statistic, 0.76; 95% confidence interval [CI], .72-.80) than any biomarker (C statistic, 0.66-0.70) or the Restricted Index (C statistic, 0.71; 95% CI, .67-.75). Compared to the Restricted Index alone, NRI resulted from incremental addition of VACS Index components (10%), D-dimer (7%), and sCD14 (4%), but not from IL-6 (0%).Among HIV-infected individuals, independent of CD4, HIV-1 RNA, and age, hemoglobin and markers of liver and renal injury are associated with inflammation. Addition of D-dimer and sCD14, but not IL-6, improves the predictive accuracy of the VACS Index for mortality.

PubMed ID: 22337823 Exiting the NIEHS site

MeSH Terms: Adult; Aged; Aged, 80 and over; Aging*; Biomarkers/blood*; Female; Fibrin Fibrinogen Degradation Products/analysis*; HIV Infections/diagnosis*; HIV Infections/mortality*; HIV Infections/pathology; HIV-1/immunology; HIV-1/pathogenicity; Humans; Interleukin-6/blood*; Lipopolysaccharide Receptors/blood*; Male; Middle Aged; Prognosis; Survival Analysis

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