| VARIABLES | POINTS |
| Symptoms/signs of DVT ( minimum of leg swelling and pain with palpation of the deep veins | 3.0 |
| Alternative diagnosis deemed less likely than PE | 3.0 |
| Heart rate >100 beats/min | 1.5 |
| Immobilization/surgery in previous 4 wk | 1.5 |
| Previous VTE | 1.5 |
| Hemoptysis | 1.0 |
| Recent or current malignancy | 1.0 |
Clinical Probability:
Low Probability <2.0
Intermediate Probability 2.0 -6.0
High Probability >6.0
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