| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty remembering/concentrating | 433 |
97.1%
|
| 2 | some difficulty | 7 |
1.6%
|
| 3 | a lot of difficulty | 3 |
0.7%
|
| 4 | cannot remember/concentrate at all | 3 |
0.7%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 12503 |