| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 93 |
6.1%
|
| 2 | Yes, doctor’s initiative | 49 |
3.2%
|
| 3 | Yes, screening program | 4 |
0.3%
|
| 4 | No | 1321 |
86.6%
|
| 5 | Don’t know | 59 |
3.9%
|
| Sysmiss | 1425 |