FIGURE 2.

Feature importance of the extreme gradient boost model. The bars indicate the feature importance, while the interval bands indicate difference due to random permutations. From the model, clinical neuropsychological features of RCFT delayed recall, clinical dementia rating-sum of boxes, and age were noted as important factors to the global performance. XGB, extreme gradient boost; RCFT, Rey–Osterrieth Complex Figure Test; CDR-SOB, clinical dementia rating-sum of boxes; K-MMSE, Korean version of the Mini-Mental State Examination; COWAT, Controlled Oral Word Association; SVLT, Seoul Verbal Learning Test; APOE, apolipoprotein E; K-BNT, Korean version of the Boston Naming Test; AUC, area under the receiver operating characteristic curve.