Table 4.
Performance on digital clock drawing task variables in healthy control (HC) individuals and patients with amnestic mild cognitive impairment (aMCI) with normal clock drawing scores (i.e. a score of 1 or 2).
| Group | p-value | ||
|---|---|---|---|
| HC | aMCI | ||
| n = 137 | n = 95 | ||
| dCDT total time (ms) | 43393.4 (15218.3) | 64974.2 (30708.4) | <0.0001 |
| dCDT time on surface (ms) | 14550.9 (5069.5) | 18437.0 (6693.8) | <0.0001 |
| dCDT strokes per minute | 39.4 (14.4) | 33.5 (12.3) | 0.0014 |
| dCDT time in air (ms) | 13472.6 (4936.3) | 22674.6 (11939.1) | <0.0001 |
| dCDT time not painting (ms) | 34264.4 (19458.7) | 49038.6 (38198.5) | <0.0001 |
| dCDT pen-up stroke length | 2189.9 (10358.1) | 2858.9 (1469.1) | <0.0001 |
| dCDT pen-up/pen-down relation | 1.07 (0.43) | 1.24 (0.65) | 0.0223 (ns) |
| dCDT velocity | 9.4 (2.2) | 8.4 (2.2) | 0.0006 |
| dCDT pressure | 0.31 (0.09) | 0.29 (0.09) | 0.2868 |
| dCDT pressure-velocity relation | 2.18 (0.79) | 2.15 (0.98) | 0.984 |
Values are displayed in mean (standard deviation); n = number; HC: healthy control individuals; aMCI: amnestic mild cognitive impairment; dCDT = digital Clock Drawing Test; ms = time in milliseconds.