Secondary risk factors of VTE | patient n (%) |
Trauma and/or surgery Malignant tumor History of venous thrombosis Old age (>75 years) Antiphospholipid antibody positive Stroke sequelae long-term bed rest Varicose veins of lower extremities Steroid hormone application Long term oral contraceptive Hyperhemoglobinemia Peripheral venous catheterization | 52 (48.1) 22 (20.3) 18 (16.7) 17 (17.7) 13 (12.0) 9 (8.3) 8 (7.4) 7 (6.5) 4 (3.7) 2 (1.8) 2 (1.8) |