| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty remembering/concentrating | 11579 |
89.4%
|
| 2 | some difficulty | 1046 |
8.1%
|
| 3 | a lot of difficulty | 304 |
2.3%
|
| 4 | cannot remember/concentrate at all | 16 |
0.1%
|
| 8 | don't know | 4 |
0%
|