Figure 2.

The Gini importance of the factors that significantly contributed to the decision tree models, as compared to the 95% empiric confidence intervals of chance for each factor displayed in gray. In addition to the above, muscle twitching, sleep deprivation, incontinence, and hallucinations, also contributed significantly but the relative magnitude of their contribution was too small to display simultaneously. Gini importance quantifies the contribution of a factor to a decision tree model, with a larger importance reflecting larger contribution to the diagnosis of more patients. The absolute magnitude of Gini importance is not meaningful in isolation, but can be compared across factors. See Supplemental Figure 2 for an exact summary of all 20 decision trees. Abbreviations: movements (mvmts), seconds (s).