Figure 8. Variable importance assessing the relative importance of individual predictors in the random Figure 8. Variable importance assessing the relative importance of individual predictors in the forest model. According to the legend on the right, the lighter the color, the higher the contribution of random forest model. According to the legend on the right, the lighter the color, the higher the the variable to the classification between patients with and without contribution of the variable to the classification between patients with and without impairment .