Diagnostic value of digital clock drawing test in comparison with CERAD neuropsychological battery total score for discrimination of patients in the early course of Alzheimer's disease from healthy individuals.

Digital clock drawing performance in healthy individuals, patients with aMCI or mAD Analysis of dCDT variables found highly significant differences between the investigated groups in total time, time on surface, time in air, pen-up stroke length, strokes per minute, time not painting, pen-up/pen-down relation, velocity, and pressure-velocity relation (all p < 0.0001; Table 3 ).

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