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Variable selection for clinical prediction models. (A, C) The variable importance ranking for constructing the BASFI prediction model and BASDAI prediction model, respectively. (B) Correlation heat map of the variables in the training set. (D) Venn diagrams for the above two models incorporating variables (ET, Extra Tree Regressor; RF, Random Forest Regressor; GBM, Gradient Boosting Machine Regressor; AB, AdaBoost Regressor).
