Fig. 3

Feature correlations and distribution of feature importance for (a) the 33-feature gradient-boosted decision trees model (33F) and (b) the logistic regression (LR) model. Model input variables are ranked in descending order of feature importance. Red is indicative of a high feature value and blue is indicative of a low feature value. Points to the right of the line of neutral contribution resulted in a higher score; points to the left of this line resulted in a lower score