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. 2020 Oct 15;21:267. doi: 10.1186/s12931-020-01535-5

Fig. 4.

Fig. 4

Graphical representation of CARTs grown for each outcome using the pulmonary function parameters identified by the Boruta algorithm. In the rectangular boxes the pulmonary function parameters used to split the tree are depicted. Values reported at both sides of the boxes represent the parameters values at which the split was performed. Bottom boxes are the “leaves” of the tree. They show the mean values of the Borg scale (ranging between 0 and 1) and the percentages of patients with that belong to that leaf