Multivariate Logistic Regression Model
Ref : Parsonnet V et al. A method of uniform stratification of risk for evaluating the results of surgery in acquired adult heart disease. Circulation. 1989;79:I 3-12.
Definitions of risk factors
One can assume the definitions
are the same as in Additive Model.
For several risk factors (smoking, cholesterol...), definitions are
not available.