Table 2.
Cognitive disorders relevant for AD clinical trials.
| Impairment | Cognitively unimpaired |
Cognitively impaired |
|||||
|---|---|---|---|---|---|---|---|
| Cognitively normal | Subjective cognitive decline | Subtle objective cognitive deficit | MCI | Dementia |
|||
| Mild | Moderate | Severe | |||||
| Subjective | No | Yes | No | Yes | Yes | Yes | Yes |
| Objective | No | No | Yes | Yes | Yes | Yes | Yes |
| IADL | No | No | No | No | Yes | Yes | Yes |
| BADL | No | No | No | No | No | Yes | Yes |
| Fully Dependent | No | No | No | No | No | No | Yes |
BADL: Basic Activities of Daily Living; IADL: Instrumental Activities of Daily Living; MCI: mild cognitive impairment.