Fig. 1
From: Evaluation of four clinical laboratory parameters for the diagnosis of myalgic encephalomyelitis
Decision tree produced using CART analysis. Each node represents a split value of the independent variable, which determines the optimal number cases or controls predicted by the analysis. Colored boxes represent the terminal point of the decision metric. Blue boxes represent cases and red boxes represent controls. A comprehensive version of the decision tree, which defines the predictive algorithm, is presented as Additional file 1: Figure S1