| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty remembering/concentrating | 2171 |
98.1%
|
| 2 | some difficulty | 23 |
1%
|
| 3 | a lot of difficulty | 9 |
0.4%
|
| 4 | cannot remember/concentrate at all | 9 |
0.4%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 10737 |