We aimed to determine the risk of recurrence for symptomatic venous thromboembolism (VTE) provoked by different transient risk factors. DATA SOURCES: MEDLINE, EMBASE, and Cochrane Collaboration Registry of Randomized Trials databases were searched. STUDY SELECTION: Prospective cohort studies and randomized trials of patients with a first episode of symptomatic VTE provoked by a transient risk factor and treated for at least 3 months were identified. DATA EXTRACTION: Number of patients and recurrent VTE during the 0- to 12-month and 0- to 24-month intervals after stopping therapy, study design, and provoking risk factor characteristics were extracted. DATA SYNTHESIS: Annualized recurrence rates were calculated and pooled across studies. At 24 months, the rate of recurrence was 3.3% per patient-year (11 studies, 2268 patients) for all patients with a transient risk factor, 0.7% per patient-year (3 studies, 248 patients) in the subgroup with a surgical factor, and 4.2% per patient-year (3 studies, 509 patients) in the subgroup with a nonsurgical factor. In the same studies, the rate of recurrence after unprovoked VTE was 7.4% per patient-year. The rate ratio for a nonsurgical compared with a surgical factor was 3.0 and for unprovoked thrombosis compared with a nonsurgical factor was 1.8 at 24 months. CONCLUSIONS: The risk of recurrence is low if VTE is provoked by surgery, intermediate if provoked by a nonsurgical risk factor, and high if unprovoked. These risks affect whether patients with VTE should undergo short-term vs indefinite treatment.
|Data di pubblicazione:||2010|
|Titolo:||Risk of recurrence after a first episode of symptomatic venous thromboembolism provoked by a transient risk factor: a systematic review.|
|Citazione:||Iorio, A., Kearon, C., Filippucci, E., Marcucci, M., Macura, A., Pengo, V., et al. (2010). Risk of recurrence after a first episode of symptomatic venous thromboembolism provoked by a transient risk factor: a systematic review. ARCHIVES OF INTERNAL MEDICINE, 170(170), 1710-1716.|
|Appare nelle tipologie:||1.01 Articolo in rivista|