Clinical model for predicting pretest probability for DVT3
| . | Score . |
|---|---|
| Active cancer (treatment ongoing or within previous 6 mo or palliative) | 1 |
| Paralysis, paresis or recent plaster immobilization of the lower extremities | 1 |
| Recently bedridden > 3 d or major surgery within 4 wk | 1 |
| Localized tenderness along the distribution of the deep venous system | 1 |
| Entire leg swollen | 1 |
| Calf swelling 3 cm > asymptomatic side (measured 10 cm below tibial tuberosity) | 1 |
| Pitting edema confined to the symptomatic leg | 1 |
| Collateral superficial veins (nonvaricose) | 1 |
| Alternative diagnosis as likely or greater than that of DVT | −2 |
| . | Score . |
|---|---|
| Active cancer (treatment ongoing or within previous 6 mo or palliative) | 1 |
| Paralysis, paresis or recent plaster immobilization of the lower extremities | 1 |
| Recently bedridden > 3 d or major surgery within 4 wk | 1 |
| Localized tenderness along the distribution of the deep venous system | 1 |
| Entire leg swollen | 1 |
| Calf swelling 3 cm > asymptomatic side (measured 10 cm below tibial tuberosity) | 1 |
| Pitting edema confined to the symptomatic leg | 1 |
| Collateral superficial veins (nonvaricose) | 1 |
| Alternative diagnosis as likely or greater than that of DVT | −2 |
In patients with symptoms in both legs, the more symptomatic leg is used. Pretest probability calculated as the total score: high ≥ 3; moderate 1 or 2; low ≤ 0.