| Classification | Number of codes |
| Characterized by type of dementia | 14 |
| There are things that can be used to judge cognitive deterioration | 12 |
| Use cognitive function assessment tool | 6 |
| Heart failure affects cognitive decline | 6 |
| Get information from family members and related departments and judge cognitive function | 5 |
| Determination of dementia, type and severity is difficult | 5 |
| Characterized by the severity of dementia | 4 |
| There are times when it is possible to distinguish between dementia and delirium | 4 |
| It is difficult to show characteristics of delirium and onset of dementia | 3 |
| Nursing protocols cover the elderly | 2 |
| Memory is not decreasing at the time of decrease in consciousness/delirium | 2 |
| There are some factors that cause a decline in cognitive function/awareness level | 2 |
| Sometimes diagnosis of dementia is not examined | 1 |