| Advantage Frequency | Frequency | Percentage |
| 1) Attitude to screening | ||
| Positive | 62 | 64.6 |
| Negative | 34 | 35.4 |
| Total | 96 | 100 |
| 2) C Knowledge of the existence of CDV | ||
| Know the existence | 22 | 22.9 |
| Ignore the existence | 74 | 77.1 |
| Total | 96 | 100 |
| 3) Practice of voluntary testing | ||
| Have already passed the test | 15 | 14.6 |
| Have never taken the test | 82 | 85.4 |
| Total | 96 | 100 |