| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 29 |
1.9%
|
| 2 | Yes, doctor’s initiative | 13 |
0.9%
|
| 3 | Yes, screening program | 5 |
0.3%
|
| 4 | No | 1438 |
94.2%
|
| 5 | Don’t know | 41 |
2.7%
|
| Sysmiss | 1425 |