Abstract | BACKGROUND: Previous reports suggest that younger carriers of the factor V Leiden mutation are at greater risk for venous thromboembolism than are older carriers. However, available data on thromboembolic risk are limited. OBJECTIVE: DESIGN: Prospective cohort study. PATIENTS: MEASUREMENTS: RESULTS: Risks for venous thromboembolism in heterozygous carriers of factor V Leiden mutation increased with age at a rate significantly greater than that in noncarriers. Whereas incidence rates of venous thromboembolism were similar in men with and men without the factor V Leiden mutation who were younger than 50 years of age, incidence rate differences (per 1000 person-years of observation) between affected and unaffected men increased significantly from 1.23 (95% CI, -0.4 to 2.9) for those aged 50 to 59 years to 1.61 (CI, -0.5 to 3.7) for those aged 60 to 69 years of age to 5.97 (CI, 0.6 to 11.3) for those aged 70 years or older (P for trend = 0.008). For idiopathic venous thromboembolism, age-specific incidence rate differences between men with and without the factor V Leiden mutation increased significantly with age (P = 0.017). However, no significant relation was found for secondary events (P > 0.2). CONCLUSIONS: The findings support the hypothesis that the pathogenesis of venous thromboembolism involves acquired as well as genetic risk factors and indicate that determination of factor V Leiden mutation status should not be limited to young patients.
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Authors | P M Ridker, R J Glynn, J P Miletich, S Z Goldhaber, M J Stampfer, C H Hennekens |
Journal | Annals of internal medicine
(Ann Intern Med)
Vol. 126
Issue 7
Pg. 528-31
(Apr 01 1997)
ISSN: 0003-4819 [Print] United States |
PMID | 9092318
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
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Topics |
- Adult
- Age Distribution
- Aged
- Factor V
(genetics)
- Heterozygote
- Humans
- Incidence
- Male
- Middle Aged
- Mutation
- Protein C
(metabolism)
- Thrombophlebitis
(epidemiology, genetics)
- United States
(epidemiology)
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