Journal
LANCET
Volume 367, Issue 9516, Pages 1075-1079Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S0140-6736(06)68474-2
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Funding
- Medical Research Council [G108/492] Funding Source: Medline
- Medical Research Council [G108/492] Funding Source: researchfish
- MRC [G108/492] Funding Source: UKRI
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Background Acute infection increases the risk of arterial cardiovascular events, but effects on venous thromboembolic disease are less well established. Our aim was to investigate whether acute infections transiently increase the risk of venous thromboembolism. Methods We used the self-controlled case-series method to study the risk of first deep vein thrombosis (DVT) (n=7278) and first pulmonary embolism (PE) (n=3755) after acute respiratory and urinary tract infections. Data were obtained from records from general practices who had registered patients with the UK's Health Improvement Network database between 1987 and 2004. Findings The risks of DVT and PE were significantly raised, and were highest in the first two weeks, after urinary tract infection. The incidence ratio for DVT was 2.10 (95% CI 1.56-2.82), and that for PE 2.11 (1.38-3.23). The risk gradually fell over the subsequent months, returning to the baseline value after 1 year. The risk of DVT was also higher after respiratory tract infection, but possible diagnostic misclassification precluded a reliable estimate of the risk of PE after respiratory infection. Interpretation Acute infections are associated with a transient increased risk of venous thromboembolic events in a community setting. Our results confirm that infection should be added to the list of precipitants for venous thromboembolism, and suggest a causal relation.
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