Risk score | |||
1 point | 2 points | 3 points | 5 points |
Age 41 to 60 years | Age 61 to 74 years | Age ≥75 years | Stroke (<1 month) |
Minor surgery | Arthroscopic surgery | History of VTE | Elective arthroplasty |
BMI >25 kg/m2 | Major open surgery (>45 minutes) | Family history of VTE | Hip, pelvis, or leg fracture |
Swollen legs | Laparoscopic surgery (>45 minutes) | Factor V Leiden | Acute spinal cord injury (<1 month) |
Varicose veins | Malignancy | Prothrombin 20210A | |
Pregnancy or postpartum | Confined to bed (>72 hours) | Lupus anticoagulant | |
History of unexplained or recurrent spontaneous abortion | Immobilizing plaster cast | Anticardiolipin antibodies | |
Oral contraceptives or hormone replacement | Central venous access | Elevated serum homocysteine | |
Sepsis (<1 month) | Heparin-induced thrombocytopenia | ||
Serious lung disease, including pneumonia (<1 month) | Other congenital or acquired thrombophilia | ||
Abnormal pulmonary function | |||
Acute myocardial infarction | |||
Congestive heart failure (<1 month) | |||
History of inflammatory bowel disease | |||
Medical patient at bed rest | |||
Interpretation | |||
Surgical risk category* | Score | Estimated VTE risk in the absence of pharmacologic or mechanical prophylaxis (percent) | |
Very low (see text for definition) | 0 | <0.5 | |
Low | 1 to 2 | 1.5 | |
Moderate | 3 to 4 | 3.0 | |
High | ≥5 | 6.0 |
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