You can try the system for yourself using interactive calculator and selecting "LOGISTIC" (available in six languages)
How to calculate the logistic EuroSCORE
Roques F, Michel P, Goldstone AR, Nashef SA. The logistic EuroSCORE. Eur Heart J. 2003 May;24(9):8823
Using the same risk factors as the additive model, the logistic regression version of the score (the “logistic EuroSCORE”) can be calculated. For a given patient, the “logistic EuroSCORE” which is the predicted mortality according to the logistic regression equation, can be achieved with the following formula:
Predicted mortality = e ^{(βo + }^{ åbi Xi)} / 1+ e ^{(βo + }^{ åbi Xi)}
where
e is the natural logarithm = 2.718281828...
βo is the constant of the logistic regression equation = 4.789594
βi is the coefficient of the variable Xi in the logistic regression equation provided in the table below.
Xi = 1 if a categorical risk factor is present and 0 if it is absent
For age, Xi = 1 if patient age < 60; Xi increase by one point per year thereafter;
hence for age 59 or less Xi = 1, age 60 Xi = 2, age 61 Xi = 3, and so on.
Cardiologists and cardiac surgeons will be relieved to note that they do not have to face this complex calculation with every patient.
EuroSCORE (additive and logistic) can be calculated with ease using the online calculator on the EuroSCORE website.
Beta coefficients for the Logistic regression model of EuroSCORE in the 1995 pilot study
Patientrelated factors  Beta  
Age 

0.0666354 
Sex 

0.3304052 
Chronic pulmonary disease 

0.4931341 
Extracardiac arteriopathy 

0.6558917 
Neurological dysfunction disease 

0.841626 
Previous cardiac surgery 

1.002625 
Serum creatinine 

0.6521653 
Active endocarditis 

1.101265 
Critical preoperative state 

0.9058132 
Cardiacrelated factors  Beta  
Unstable angina 

0.5677075 
LV dysfunction 

0.4191643 

1.094443  
Recent myocardial infarct 

0.5460218 
Pulmonary hypertension 

0.7676924 
Operationrelated factors  Beta  
Emergency 

0.7127953 
Other than isolated CABG 

0.5420364 
Surgery on thoracic aorta 

1.159787 
Postinfarct septal rupture  1.462009 