| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, own initiative | 343 |
11.6%
|
| 2 | Yes, doctor’s initiative | 269 |
9.1%
|
| 3 | Yes, screening program | 16 |
0.5%
|
| 4 | No | 2227 |
75.5%
|
| 5 | Don’t know | 96 |
3.3%
|