| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, the study representative assisted on 1 or 2 sheets | 26 |
1.2%
|
| 2 | Yes, the participant responded to questionnaire on his/her own | 1819 |
87.1%
|
| 3 | No, the study representative assisted on 3 and more sheets | 25 |
1.2%
|
| 4 | No, the study representative assisted on all sheets | 219 |
10.5%
|
| Sysmiss | 1510 |