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Familial Clustering of Venous Thromboembolism - A Danish Nationwide Cohort Study.

Sindet-Pedersen, Caroline; Bruun Oestergaard, Louise; Gundlund, Anna; Fosbøl, Emil Loldrup; Aasbjerg, Kristian; Langtved Pallisgaard, Jannik; Gislason, Gunnar; Torp-Pedersen, Christian; Bjerring Olesen, Jonas.
PLoS One; 11(12): e0169055, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28033406

BACKGROUND:

Identification of risk factors for venous thromboembolism (VTE) is of utmost importance to improve current prophylactic regimes and treatment guidelines. The extent to which a family history contributes to the risk of VTE needs further exploration.

OBJECTIVES:

To examine the relative rate of VTE in first-degree relatives compared with the general population.

METHODS:

By crosslinking Danish nationwide registries we identified patients with VTE between 1978 and 2012, and their familial relations. The first member in a family to acquire VTE was defined as the proband. All first-degree relatives to probands were followed from the VTE date of the proband and until an event (VTE), death, emigration, 100 year birthday or end of study: 31st of December 2012, whichever came first. The relative rate of VTE was estimated by standardized incidence ratios (SIR) using time-dependent Poisson regression models, with the general population as a fixed reference.

RESULTS:

We identified 70,767 children of maternal probands, 66,065 children of paternal probands, and 29,183 siblings to sibling probands. Having a maternal proband or a paternal proband were associated with a significantly increased VTE rate of 2.15 (CI: 2.00-2.30) and 2.06 (CI: 1.92-2.21), respectively. The highest estimate of VTE was observed among siblings (adjusted SIR of 2.60 [CI: 2.38-2.83]). Noteworthy, the rate of VTE increased for all first-degree relatives when the proband was diagnosed with VTE in a young age (≤ 50 years).

CONCLUSION:

A family history of VTE was associated with a significantly increased rate of VTE among first-degree relatives compared with the general population.
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