Interobserver averaged hippocampal sulcus (HS) width (fimbriosubicular distance) according to grade of medial temporal lobe atrophy (MTA) in patients with Alzheimer disease (AD) (n = 21) and nondemented elderly control subjects (n = 15)
| MTA score | Mean HS Width in mm (SD) | P Value | |
|---|---|---|---|
| AD Patients | Control Subjects | ||
| 0 (n = 3) | 1.4 (0.5) | ||
| 1 (n = 18) | 2.1 (0.5) | 1.3 (0.7) | P < 0.05 |
| 2 (n = 6) | 2.5 (0.1) | 1.7 (0.4) | P < 0.05 |
| 3 (n = 6) | 3.5 (0.4) | ||
| 4 (n = 3) | 4.1 (1.1) | ||