| Abrupt onset | 2 |
| Stepwise progression | 1 |
| Fluctuating course | 2 |
| Nocturnal confusion | 1 |
| Relative preservation of personality | 1 |
| Depression | 1 |
| Somatic complaints | 1 |
| Emotional incontinence | 1 |
| History of hypertension | 1 |
| History of strokes | 2 |
| History of associated atherosclerosis | 1 |
| Focal neurologic symptoms | 2 |
| Focal neurologic signs | 2 |
published 2000