| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 25 |
1.6%
|
| 2 | Yes, doctor’s initiative | 16 |
1%
|
| 3 | Yes, screening program | 4 |
0.3%
|
| 4 | No | 1448 |
94.9%
|
| 5 | Don’t know | 33 |
2.2%
|
| Sysmiss | 1425 |