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| Symptom score change | BrainPower group | Placebo group | Total | |||
|---|---|---|---|---|---|---|
| N | % | N | % | N | % | |
| −3 | 2 | 4.3 | 2 | 3.9 | 4 | 4.1 |
| −2 | 14 | 29.8 | 8 | 15.7 | 22 | 22.4 |
| −1 | 20 | 42.6 | 10 | 19.6 | 30 | 30.6 |
| 0 | 9 | 19.1 | 15 | 29.4 | 14 | 14.3 |
| +1 | 2 | 4.3 | 11 | 21.6 | 13 | 13.3 |
| +2 | 0 | 0.0 | 3 | 5.9 | 3 | 3.1 |
| +3 | 0 | 0.0 | 2 | 3.9 | 2 | 2.0 |
| Total | 47 | 100.0 | 51 | 100.0 | 98 | 100.0 |
