| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 158 |
5.4%
|
| 2 | Yes, doctor’s initiative | 154 |
5.2%
|
| 3 | Yes, screening program | 13 |
0.4%
|
| 4 | No | 2518 |
85.3%
|
| 5 | Don’t know | 108 |
3.7%
|