Fig. 3From: Dyspnea, effort and muscle pain during exercise in lung transplant recipients: an analysis of their association with cardiopulmonary function parameters using machine learningVariable importance Boruta for muscle pain at the peak. On the x-axis the pulmonary function parameters are reported, whereas Z-score are reported on the y-axis. Boxplots represent the distribution of Z-score for each parameter returned by the algorithm. Green boxplots identify the parameters selected by the algorithm, whereas red boxplots denote the parameters discarded by the algorithmBack to article page