Table 1.
Flowchart: search strategies in on-line resources.
| Database | Search Equation | Articles Found | Articles Selected |
|---|---|---|---|
| PubMed | Dementia AND chess | 6 | 4 |
| Alzheimer disease OR dementia AND chess OR chess game AND protective factor | 2 | 2 | |
| Chess AND dementia OR Alzheimer’s disease AND memory AND perception AND attention | 216 | 4 | |
| Chess OR chess game AND dementia OR Alzheimer’s disease | 123 | 4 | |
| Scopus | Dementia AND chess | 5 | 3 |
| Dementia AND chess AND Alzheimer’s disease | 2 | 2 | |
| Dementia OR Alzheimer’s disease AND chess OR chess game | 4 | 0 | |
| Chess AND dementia OR Alzheimer’s disease AND memory AND perception AND attention | 0 | 0 | |
| Chess AND dementia OR Alzheimer’s disease | 15 | 2 | |
| CINALH | Chess AND dementia AND Alzheimer’s disease | 28 | 0 |
| Google Academic | Chess AND dementia | 0 | 0 |
| Chess AND dementia | 4 | 0 | |
| LILACS | Chess AND dementia | 8 | 0 |
| CUIDEN | Ajedrez AND demencia | 0 | 0 |