Open Access
Table 1
Wells et al. clinical model to assess pre-test probability of deep vein thrombosis.
| Clinical features | Score |
|---|---|
| Active cancer (treatment ongoing or within previous 6 months or palliative) | 1 |
| Paralysis, paresis, or recent plaster immobilization of the legs | 1 |
| Recently bedridden for more than 3 days or major surgery within 4 weeks | 1 |
| Localized tenderness along the distribution of the deep venous system | 1 |
| Entire leg swollen | 1 |
| Calf swelling by more than 3 cm compared with the asymptomatic leg (measured 10 cm below the tibial tuberosity) | 1 |
| Pitting oedema (greater in the symptomatic leg) | 1 |
| Collateral superficial veins (non-varicose) | 1 |
| Alternative diagnosis as likely or wider than that of deep vein thrombosis | −2 |
Note. Low probability: score of 0 or less; Moderate probability: 1–2; High probability: 3 or more.
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