Major bleeding after hospitalization for deep-venous thrombosis

Area of Science:

• Cardiovascular Medicine
• Pharmacology
• Public Health

Background:

• Oral anticoagulant therapy is crucial for managing deep-vein thrombosis (DVT).
• Bleeding is a significant adverse event associated with oral anticoagulants.
• Previous studies often lacked control groups for assessing bleeding risk.

Purpose of the Study:

• To determine the incidence, time course, and risk factors for major bleeding post-discharge in DVT patients.
• To estimate the excess bleeding risk attributable to oral anticoagulant therapy.
• To compare bleeding rates in DVT patients with control groups.

Main Methods:

• Analysis of 22,000 adult DVT patients hospitalized in California (1992-1994).
• Identification of risk factors for readmission due to bleeding.
• Comparison with matched cohorts of patients with pneumonia or cellulitis.

Main Results:

• 1.4% of DVT patients were readmitted for bleeding within 91 days, with rates highest in the first 30 days.
• Risk factors included prior gastrointestinal bleeding, alcohol-related diagnoses, chronic renal disease, female gender, malignancy, nonwhite race, and age >65.
• DVT patients had a 2-fold higher risk of readmission for bleeding compared to cellulitis or pneumonia cohorts.

Conclusions:

• Rehospitalization for bleeding is a significant concern following DVT treatment, peaking in the initial post-discharge period.
• The risk of bleeding is approximately double that of patients hospitalized for other conditions like cellulitis or pneumonia.
• Further research is needed to understand the increased risk observed in women and nonwhite patients.