Wells Score for PE Calculator
Calculate pretest probability of pulmonary embolism (PE) using the Wells criteria to guide diagnostic decisions in line with UK clinical pathways.
PE Wells Score
About PE Wells Score
The PE Wells score is a clinical prediction rule used to estimate the pre-test probability of pulmonary embolism (PE) before more definitive testing. It helps to determine the need for further diagnostic tests.
Interpretation
UK practice uses the two-level PE Wells score from NICE guideline NG158:
- More than 4 points: PE likely
- 4 points or less: PE unlikely
An older three-level version (low below 2, moderate 2 to 6, high above 6) appears in some textbooks, but NICE pathways use the two-level cut-off.
Disclaimer
This calculator is provided for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
- Always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.
- Never disregard professional medical advice or delay seeking it because of information from this tool.
- Clinical decision-making should always incorporate the full clinical context, patient preferences, and local protocols.
- The creators of this tool accept no liability for decisions made based on its output.
If you are a patient: please discuss any results with your healthcare provider. This tool is designed for use by medical professionals and may not be appropriate for self-assessment.
References
- Wells PS, Anderson DR, Rodger M, et al. (2000). Derivation of a simple clinical model to categorize patients' probability of pulmonary embolism: increasing the model's utility with the SimpliRED D-dimer. Thrombosis and Haemostasis, 83(3), 416-420.
- NICE (2020). Venous thromboembolic diseases: diagnosis, management and thrombophilia testing (NG158).