Outcome measures of the landmark and traffic sign identification task in Alzheimer’s disease and normal controls with one to one age matching, compared using the Wilcoxon rank sum test
| AD (n = 23) | Normal (n = 23) | p Value | |
|---|---|---|---|
| Values are mean (SD). | |||
| AD, Alzheimer’s disease; LTIT, landmark and traffic sign identification task. | |||
| Landmark identification (%) | |||
| All | 29.1 (14.7) | 44.5 (14.8) | 0.0056 |
| High saliency only | 46.4 (22.4) | 68.1 (21.3) | 0.0002 |
| Traffic sign identification (%) | |||
| All | 44.9 (25.0) | 68.5 (20.1) | 0.0013 |
| High saliency only | 54.7 (27.6) | 80.9 (21.5) | 0.0002 |
| Total LTIT identification (%) | |||
| All | 37.7 (13.8) | 57.7 (16.4) | 0.0001 |
| High saliency only | 51.9 (19.4) | 76.7 (20.0) | 0.0001 |
| At-fault safety errors | |||
| During LTIT | 1.8 (1.7) | 0.5 (1.0) | 0.0009 |
| Baseline | 5.9 (5.3) | 2.0 (1.9) | 0.0058 |