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 Blood, 1 October 2008, Vol. 112, No. 7, pp. 2675-2680.
Prepublished online as a Blood First Edition Paper on July 9, 2008; DOI 10.1182/blood-2008-05-157412.

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CLINICAL TRIALS AND OBSERVATIONS

High-density lipoprotein cholesterol and venous thromboembolism in the Longitudinal Investigation of Thromboembolism Etiology (LITE)

Alanna M. Chamberlain1, Aaron R. Folsom1, Susan R. Heckbert2, Wayne D. Rosamond3, and Mary Cushman4

1 Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis; 2 Department of Epidemiology, Cardiovascular Health Research Unit, University of Washington, Seattle; 3 Department of Epidemiology, School of Public Health, University of North Carolina at Chapel Hill; and 4 Department of Medicine, Division of Hematology/Oncology, University of Vermont, Burlington

We determined prospectively the risk of venous thromboembolism (VTE) in relation to baseline high-density lipoprotein cholesterol (HDL-c) in 19 049 participants of the Longitudinal Investigation of Thromboembolism Etiology (LITE), which was composed of 14 490 participants of the Atherosclerosis Risk in Communities (ARIC) study and 4559 participants of the Cardiovascular Health Study (CHS). In addition, we determined the risk of VTE in relation to baseline subfractions of HDL (HDL2 and HDL3) and apolipoprotein A-I (apoA-I) in 14 488 participants of the ARIC study. Age-adjusted incidence rates of VTE by HDL-c quartile ranged from 1.64 to 1.91 per 1000 person-years in men and 1.40 to 1.94 per 1000 person-years in women; however, there was no apparent trend of VTE incidence across HDL-c quartiles for either sex. The multivariate adjusted hazard ratios of VTE by HDL-c quartiles (with quartile 4 as the reference) were nonsignificant for both sexes and ranged between 0.91 and 0.99 for men and 0.78 and 1.22 for women. Results did not differ in separate evaluations of idiopathic and secondary VTE. In the ARIC study, there was no trend of VTE hazard ratios across quartiles of HDL2, HDL3, or apoA-I. Low HDL-c does not appear to be an important VTE risk factor.


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