Oxford Neural Network Score (Willan, Katz and Keeling 2018) Disclaimer: Please note that this risk assessment tool has been developed using data from a cohort of patients at a single centre in the UK. It is NOT validated for clinical use and should not be used to inform clinical decision making. This tool is intended for experimentation with theoretical cases alongside the published article, to aid understanding of the way the risk assessment tool works. 1. Sex:
Male Female
2. Age:

3. D-dimer:

4. Active Cancer:
(Treatment or palliation within 6 months)
No Yes
5. Bedridden recently >3 days or major surgery within four weeks:
No Yes
6. Calf swelling >3 cm compared to the other leg:
(Measured 10cm below tibial tuberosity)
No Yes
7. Collateral (nonvaricose) superficial veins present:
No Yes
8. Entire leg swollen:
No Yes
9. Localized tenderness along the deep venous system:
No Yes
10. Pitting edema, confined to symptomatic leg:
No Yes
11. Paralysis, paresis, or recent plaster immobilization of the lower extremity:
No Yes
12. Previously documented DVT:
No Yes
13. Alternative diagnosis to DVT as likely or more likely:
No Yes

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