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Thromb J. 2011 Oct 13;9(1):15. doi: 10.1186/1477-9560-9-15.

Risk of venous thromboembolism and benefits of prophylaxis use in hospitalized medically ill US patients up to 180 days post-hospital discharge.

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1
STATinMED Research and The University of Michigan, Ann Arbor, MI, USA. obaser@statinmed.com.

Abstract

BACKGROUND:

To assess the incidence of venous thromboembolism (VTE) and bleeding events with or without thromboprophylaxis and the associated costs in a cohort of medically ill patients in both in-hospital and outpatient settings.

METHODS:

A large hospital drug database and linked outpatient files were used to identify patients eligible for this analysis, based on demographic and clinical characteristics.

RESULTS:

Among 11,135 patients identified, 1592 (14.30%) were admitted with chronic heart failure, 1684 (15.12%) with thromboembolic stroke, 3834 (34.43%) with severe lung disease, 1658 (14.89%) with acute infection, and 2367 (21.26%) with cancer. Of the 11,135 patients, 5932 received anticoagulant therapy at some point during their hospitalization and until 30 days after discharge. VTE events occurred in 1.30% of patients who received anticoagulant prophylaxis versus 2.99% of patients who did not. Risk-adjusted total healthcare costs for patients with a VTE or major or minor bleeding event were significantly higher than for those without events (VTE: $52,157 ± 24,389 vs $24,164 ± 11,418; major bleeding: $33,656 ± 18,196 vs $24,765 ± 11,974; minor bleeding: $33,690 ± 14,398 vs $23,610 ± 11,873). In a multivariate analysis, appropriate anticoagulant prophylaxis use was significantly associated with a reduced risk of clinical VTE, compared with no anticoagulant use (hazard ratio: 0.37). Patients admitted with thromboembolic stroke were less likely to have a VTE than patients admitted with cancer (hazard ratio: 0.42).

CONCLUSIONS:

In this analysis, VTE and major bleeding event rates were lower for patients who received prophylaxis compared with those who did not. Prophylaxis use was associated with lower healthcare costs.

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