Incidence of Venous Thromboembolism in the Year Before the Diagnosis of Cancer in 528 693 Adults

It is unclear how frequently unprovoked venous thromboembolism (VTE) reflects the presence of an occult cancer.The California Cancer Registry was used to identify diagnosed cases of 19 common malignancies during a 6-year period. Cases were linked to a hospital discharge database to identify incident VTE events in the year before the cancer diagnosis date. The standardized incidence ratio (SIR) of unprovoked VTE was determined by using the age-,...