Fig. 3

Random forest (RF)-based classification of controls and knee osteoarthritis patients. A Feature importance scores of each group of variables (Gp.) in the RF-based classification of the subjects, displayed as bar charts. Shown scores are averages of the groups’ importance scores over 100 RFs of 100 trees each, run on a dataset enriched 1000-fold before splitting training and testing data (see the “Materials and methods” section for details). B Feature importance scores of each Gp. in the RF-based classification of the subjects, displayed as bar charts. Shown scores are averages of the groups’ importance scores over 100 RFs of 100 trees each, run on a dataset enriched 1000-fold after splitting training and testing data (see the “Materials and methods” section for details)