Padua Prediction Score Calculator
Assess the risk of venous thromboembolism (VTE) in a hospitalised medical patient with the Padua Prediction Score. Eleven weighted risk factors add up to a total from 0 to 20; a score of 4 or more marks high risk, where thromboprophylaxis is usually recommended in the absence of contraindications. Tick the factors that are present to see the score and risk band.
About the Padua Prediction Score
The Padua Prediction Score risk-stratifies hospitalised medical patients for venous thromboembolism, identifying who is likely to benefit from thromboprophylaxis. Source: Barbar S, Noventa F, Rossetto V, et al., “A risk assessment model for the identification of hospitalized medical patients at risk for venous thromboembolism: the Padua Prediction Score,” Journal of Thrombosis and Haemostasis 2010;8(11):2450–2457.
Frequently asked questions
What is the Padua Prediction Score?
The Padua Prediction Score is a risk-assessment model for venous thromboembolism (VTE) in hospitalised medical patients, built from eleven weighted risk factors. Four factors score 3 points each (active cancer, previous VTE, reduced mobility, a known thrombophilic condition), recent trauma or surgery scores 2, and six further factors score 1 each. The total runs from 0 to 20.
What score means high risk?
A total of 4 or more is high risk. In the original study, high-risk patients not given prophylaxis had a much higher rate of VTE than those who were. A score below 4 is low risk, where routine pharmacological prophylaxis is generally not indicated and the decision is made case by case.
What are the eleven factors?
The eleven Padua Prediction Score factors are active cancer (+3), previous VTE excluding superficial vein thrombosis (+3), reduced mobility (+3), a known thrombophilic condition (+3), recent (≤ 1 month) trauma and/or surgery (+2), age ≥ 70 (+1), heart and/or respiratory failure (+1), acute myocardial infarction and/or ischaemic stroke (+1), acute infection and/or rheumatological disorder (+1), obesity with BMI ≥ 30 (+1) and ongoing hormonal treatment (+1). The four 3-point items carry the most weight, so any one of them together with a single 1-point factor already reaches the high-risk threshold of 4. Reduced mobility means anticipated bed rest, with bathroom privileges, for at least three days. Ticking the boxes applies these weights for you and shows the running total out of a maximum of 20.
Who is the score for?
The Padua Prediction Score was developed and validated for adult medical inpatients, not surgical patients (for whom other models such as the Caprini score are used) and not for pregnancy. It identifies who is likely to benefit from thromboprophylaxis; it does not diagnose a clot, and a patient’s bleeding risk must be weighed before starting an anticoagulant. The model was published by Barbar and colleagues in 2010 from a prospective cohort of medical inpatients in Padua, and it remains one of the models recommended for that population. Score it on admission and repeat it if the picture changes, since items such as reduced mobility and acute infection can appear during the stay.
What should a high score prompt?
A high score supports considering pharmacological thromboprophylaxis (for example low-molecular-weight or unfractionated heparin) in a non-pregnant adult without contraindications such as active bleeding, very low platelets or severe renal impairment. Where anticoagulation is contraindicated, mechanical prophylaxis such as intermittent pneumatic compression is the usual alternative. The score identifies who is likely to benefit; it does not choose the agent, the dose or the duration, which follow local policy, renal function and body weight. This calculator is an educational reference, not medical advice.
This is a reference tool, not a diagnosis or medical advice. Results depend on the laboratory, assay and clinical context, and reference intervals vary between labs and by age and sex — always read your result against the range printed on your own report and discuss it with a qualified healthcare professional.
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