Time 1 prevalence of the well subjects and preclinical syndromes
| Subgroup | Prevalence (n (%)) |
| Normal subjects | 146 (32.8) |
| CI | 77 (17.3) |
| Prevascular | 55 (12.4) |
| CI+prevascular | 25 (5.4) |
| Pre-EP | 45 (10.1) |
| CI+pre-EP | 42 (9.4) |
| Prevascular+pre-EP | 31 (7.0) |
| CI+pre-vascular+pre-EP | 24 (5.4) |
| Total | 445 (100) |
CI=Cognitive impairment; Pre-EP=preclincal extrapyramidal.