| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 399 |
13.5%
|
| 2 | Yes, doctor’s initiative | 54 |
1.8%
|
| 3 | Yes, screening program | 10 |
0.3%
|
| 4 | No | 2394 |
81.1%
|
| 5 | Don’t know | 94 |
3.2%
|