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Areas under the ROC curves for Trail Making B score. Model 1 (open square): BrainAGE alone; Model 2 (open circle): MRI variables without BrainAGE and Amyloid positivity; Model 3 (open triangle): MRI variables without amyloid positivity; Model 4 (filled circle): All variables. Model 3 has an AUC which is significantly different from 0.5
