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A prospective study of venous thromboembolism in relation to factor V Leiden and related factors.
Tuesday,2012-11-06 12:05 America/Los_Angeles — eenright
| Title | A prospective study of venous thromboembolism in relation to factor V Leiden and related factors. |
| Publication Type | Journal Article |
| Year of Publication | 2002 |
| Authors | Folsom, AR, Cushman, M, Tsai, MY, Aleksic, N, Heckbert, SR, Boland, LL, Tsai, AW, N Yanez, D, Rosamond, WD |
| Journal | Blood |
| Volume | 99 |
| Issue | 8 |
| Pagination | 2720-5 |
| Date Published | 2002 Apr 15 |
| ISSN | 0006-4971 |
| Keywords | Activated Protein C Resistance, Aged, Cohort Studies, Continental Population Groups, Factor V, Genotype, Haplotypes, Humans, Incidence, Longitudinal Studies, Middle Aged, Odds Ratio, Prospective Studies, Risk Factors, Thromboembolism, Venous Thrombosis |
| Abstract | <p>The aim of this study was to examine the occurrence of venous thromboembolism (VTE) in relation to factor V-related risk factors. Using a nested case-control design combining 2 population-based prospective studies, we measured factor V Leiden, HR2 haplotype, activated protein C (APC) resistance, and plasma factor V antigen in 335 participants who developed VTE during 8 years of follow-up and 688 controls. The overall odds ratio (OR) of VTE was 3.67 (95% CI, 2.20-6.12) in participants carrying factor V Leiden compared with noncarriers. APC resistance measured after predilution with factor V-deficient plasma conferred an OR of 2.58 (95% CI, 1.62-4.10). All 3 participants homozygous for the HR2 haplotype had a VTE, and the OR of VTE for homozygosity was estimated to be 5.5 (95% CI, 2.45-12.5). Carriers of the HR2 haplotype otherwise were not at increased risk of VTE overall (OR = 1.05; 95% CI, 0.64-1.72), but double heterozygotes for HR2 and factor V Leiden carried an OR of idiopathic VTE of 16.3 (95% CI, 1.7-159) compared with noncarriers. Factor V antigen also was not associated with VTE overall, but for participants with the combination of high factor V antigen plus factor V Leiden the OR of idiopathic VTE was 11.5 (95% CI, 4.2-31.4). In the general population, APC resistance and factor V Leiden were important VTE risk factors; homozygosity for the HR2 haplotype may be a risk factor but was rare; otherwise, HR2 haplotype and factor V antigen were not risk factors except in carriers of factor V Leiden.</p> |
| DOI | 10.1182/blood.v99.8.2720 |
| Alternate Journal | Blood |
| PubMed ID | 11929758 |
| Grant List | N01-HC 55015 / HC / NHLBI NIH HHS / United States N01-HC-55016 / HC / NHLBI NIH HHS / United States N01-HC-55018 / HC / NHLBI NIH HHS / United States N01-HC-55019 / HC / NHLBI NIH HHS / United States N01-HC-55020 / HC / NHLBI NIH HHS / United States N01-HC-55021 / HC / NHLBI NIH HHS / United States N01-HC-55022 / HC / NHLBI NIH HHS / United States N01-HC-85079 / HC / NHLBI NIH HHS / United States N01-HC-85086 / HC / NHLBI NIH HHS / United States R01 HL59367 / HL / NHLBI NIH HHS / United States |