Fig. 4

Variable importance plot showing the leukocyte subpopulations and other variables that are most helpful in predicting frailty in men (n=140) and women (n=137). Participants with missing frailty index score data (n=12) were excluded from analysis. The bold lines and dots represent the most important variables that show an increase in mean squared error (MSE) of >50%. See text for the meaning of variable importance