Table 1. Characteristics of NC, MCI and AD groups and their performance on the e-CT.
| NC (N = 112) | MCI (N = 129) | AD (N = 84) | p value | |
|---|---|---|---|---|
| Demographics | ||||
| Age, years, mean (SD) | 74.7 (6.94) | 76.5 (7.49) | 76.5 (5.94) | 0.081* |
| Male, n (%) | 28 (25.0) | 48 (37.2) | 36 (42.9) | 0.024†1,2 |
| Education>12 years: n (%) | 79 (70.5) | 64 (49.6) | 45 (53.6) | 0.003†1,2 |
| Daily computer-based technology use: n (%) | 88 (78.6) | 75 (58.6) | 32 (38.1) | <0.001†1,2,3 |
| MMSE | 28.9 (1.01) | 27.1 (2.30) | 23.5 (3.10) | <0.001*1,2,3 |
| e-CT | ||||
| Correct cancellations, mean (SD) | 40.2 (5.43) | 31.1 (9.00) | 24.3 (8.72) | <0.001#1,2,3 |
| Omission errors (≥ 1): n (%) | 72 (64.9) | 74 (57.8) | 47 (56.0) | 0.385† |
| Commission errors (≥ 1): n (%) | 20 (17.9) | 25 (19.5) | 21 (25.0) | 0.449† |
| Instruction reminder (≥ 1): n (%) | 6 (5.4) | 20 (15.6) | 36 (42.9) | <0.001†1,2,3 |
*ANOVA test
†Chi-square test
#ANCOVA test
NC, normal cognition; MCI, mild cognitive impairment; AD, Alzheimer’s disease
1: NC ≠ MCI;
2: NC ≠ AD;
3: MCI ≠ AD