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| Outcome | Design | Risk of bias | Indirectness | Inconsistency | Imprecision | Publication Bias | Effect size | GRADE quality |
| Cognition | RCT*5 | -1 | 0 | 0 | 0 | -1 | 0 | ++ |
| Memory | RCT*6 | 0 | 0 | -1 | -1 | 0 | 0 | ++ |
| Attention | RCT*4 | -1 | 0 | 0 | 0 | 0 | 0 | +++ |
| Executive function | RCT*4 | -1 | 0 | 0 | 0 | 0 | +1 | +++ |
