EuroSCORE is a risk model which allows the calculation of the risk of death after a heart operation. The model asks for 17 items of information information about the patient, the state of the heart and the proposed operation, and uses logistic regression to calculate the risk of death. It is free to use on line. First published in 1999, the model has been adopted worldwide, becoming the most widely used risk index for cardiac surgery, and its use is believed to have contributed substantially to the improvement in the results of heart surgery seen at the beginning of the millennium. The original models are now aging and a new model - EuroSCORE II - was announced at the EACTS meeting in Lisbon on Monday 3rd October 2011. The updated calculator is available online at the official EuroSCORE website.

Concerns and caveats The statistical basis for the Euroscore is largely undocumented, particularly with respect to its use in determining the performance of individual surgical units. The available Euroscore papers supply logistic regression coefficients but without any measure of uncertainty and the raw data from which the calculations have been made are not available to the public. Further, in the UK a modified version of the Euroscore is commonly used although the precise modifications are also not published.