| Clinical Parameter Score |
Score |
| Active cancer (treatment ongoing, or within 6 mo or palliative) |
+1 |
| Paralysis or recent plaster immobilization of the lower extremities |
+1 |
| Recently bedridden for >3 d or major surgery <4 wk |
+1 |
| Localized tenderness along the distribution of the deep venous system |
+1 |
| Entire leg swelling |
+1 |
| Calf swelling >3 cm compared with the asymptomatic leg |
+1 |
| Pitting edema (greater in the symptomatic leg) |
+1 |
| Previous DVT documented |
+1 |
| Collateral superficial veins (nonvaricose) |
+1 |
| Alternative diagnosis (as likely or greater than that of DVT) |
-2 |
| Total of Above Score |
| High probability |
>3 |
| Moderate probability |
1 or 2 |
| Low probability |
<0 |
