Figure 4.

Feature importance graphs for ARI (A) and diarrhea (B). Note: The mean decrease in impurity is a feature importance metric describing the improvement in predictability observed due to each variable. Based on the importance score and ranking, distance-based features were most important in both ARI and diarrhea, followed by the change in the child’s MUAC for diarrhea. All the other features (after the red dashed line) showed high standard deviations, which in some instances was a negative value and, in most instances, crossed zero. These high standard deviations, combined with low feature importance, suggest that these features had limited to no contribution to the predictability of the prevalence of ARI or diarrhea. MUAC = Mid upper arm circumference; HAZ = Height-for-Age Z-score; BAZ = Body Mass Index for Age Z-score; WHZ = Weight-for-Height Z-score; WAZ = Weight-for-Age Z-score.