I work on a project, in which i want to classify e.g. patients with a disease, but I am only looking at the framework from 2007-2009, so I have also patient which already have been ill and some which become ill. And I want to look at the duration of this disease, with machine Learning. So lets say I make categories "hard diesease" and "no hard disease". How can i implement such things especially with left censoring and years to do with ML logistic regression to predict?