| Source of knowledge | Table column head | |
| Frequency | Percent | |
| Television | 185 | 37.1 |
| Internet | 147 | 29.5 |
| Health brochures | 122 | 24.4 |
| Newspaper | 108 | 21.6 |
| Family member | 95 | 19.0 |
| Friends | 79 | 15.8 |
| Others | 5 | 12 |