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- W2004956152 abstract "Combined oral contraceptives (COC) increase the risk of venous thromboembolism (VTE), but the risk of recurrent VTE is not precisely determined. In this retrospective cohort study, we sought the risk factors for recurrence after a first VTE that occurred in women taking COC.Time-to-event analysis was done with Kaplan-Meier estimates. In total, 172 patients were included (43% with pulmonary embolism): 82% had no other clinical risk factor for VTE.Among the 160 patients who stopped anticoagulation, the cumulative incidence of recurrent VTE was 5.1% after 1 year and 14.2% after 5 years. Significant factors associated with recurrence were renewed use of COC [hazard ratio (HR)=8.2 (2.1-32.2)], antiphospholipid syndrome [HR=4.1 (1.3-12.5)] and protein C deficiency or factor II G20210A [HR=2.7 (1.1-7)]. Pure-progestin contraception [HR=1.3 (0.5-3.0)] or factor V Leiden [HR=1.3 (0.5-3.4)] did not increase recurrence. Postsurgical VTE had a lower risk of recurrence [HR=0.1 (0.0-0.9)].Further studies are warranted to determine whether testing for antiphospholipid syndrome, protein C deficiency or the factor II G20210A could modify the duration of anticoagulation. This study confirms the safety of pure-progestin contraception." @default.
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- W2004956152 date "2011-11-01" @default.
- W2004956152 modified "2023-10-05" @default.
- W2004956152 title "Risk factors for recurrence of venous thromboembolism associated with the use of oral contraceptives" @default.
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- W2004956152 doi "https://doi.org/10.1016/j.contraception.2011.06.008" @default.
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