| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 285 |
9.7%
|
| 2 | Yes, doctor’s initiative | 142 |
4.8%
|
| 3 | Yes, screening program | 50 |
1.7%
|
| 4 | No | 2388 |
80.9%
|
| 5 | Don’t know | 86 |
2.9%
|