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BACKGROUND: While there have been marked advances in diagnostic and therapeutic strategies for venous thromboembolism, our understanding of its clinical epidemiology is based on studies conducted more than a decade ago.

OBJECTIVE: The purpose of this observational study was to describe the incidence and attack rates of venous thromboembolism in residents of the Worcester Statistical Metropolitan Area in 1999. We also describe demographic and clinical characteristics, management strategies, and associated hospital and 30‐day outcomes.

DESIGN AND MEASUREMENTS: The medical records of all residents from Worcester, MA (2000 census=477,800), diagnosed with International Classification of Diseases, 9th revision (ICD‐9) codes consistent with possible venous thromboembolism during 1999 were independently validated, classified, and reviewed by trained abstractors.

RESULTS: A total …