Key result
Major acquired risk factors like immobilization and surgery account for ~50% of outpatient DVT cases.
Cohort
Major risk factors such as immobilization, trauma, and recent surgery account for about half of DVT cases in symptomatic outpatients, highlighting the potential need for outpatient DVT prophylaxis.
May inform outpatient risk stratification; leaves open whether prophylaxis reduces DVT incidence in prospective studies.
Background: Epidemiologic studies on deep-vein thrombosis (DVT) have been mainly confined to the inpatient population. The aim of this study was to investigate the association between DVT and acquired risk factors in a large cohort of outpatients with clinically suspected DVT. Methods: Consecutive outpatients with clinically suspected DVT were enrolled in the study. Before objective testing, all patients were interviewed by a trained physician for the presence of risk factors for DVT development. Subsequently, the presence or absence of DVT was assessed with venography. Results: Approximately 50% of cases of DVT were considered to be secondary to a major risk factor (immobilization, trauma, and/or recent surgery). Among additional risk factors, only increased age (over 60 years), male gender, malignant neoplasm, heart failure, systemic lupus erythematosus, and arteriopathy were independently associated with the risk of acute DVT. Conclusion: Major risk factors for venous thromboembolism are a common cause of DVT among symptomatic outpatients; therefore, the usefulness of extending DVT prophylaxis in the outpatient setting should be tested. The role of additional risk factors in the development of DVT needs to be established by properly designed studies. (Arch Intern Med. 1994;154:164-168)
No takes yet. Share an insight, caveat, or question.
A. Cogo (1994) conducted a cohort in Clinically suspected deep-vein thrombosis. Acquired risk factors (e.g., immobilization, trauma, recent surgery) was evaluated on Presence of acute deep-vein thrombosis (DVT) assessed with venography. Major acquired risk factors such as immobilization, trauma, and recent surgery accounted for approximately 50% of deep-vein thrombosis cases among symptomatic outpatients.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: