| Characteristics | Sample size n = 300 | |
| Frequency | Percentage | |
| Gender |
|
|
| Male | 184 | 61.33 |
| Female | 116 | 38.67 |
| Age |
|
|
| <18 | 56 | 3.9 |
| 19 - 30 | 75 | 7.9 |
| 31 - 40 | 26 | 12.3 |
| 41 - 50 | 47 | 16.3 |
| >50 | 96 | 59.6 |
| Province/City |
|
|
| Thai Nguyen | 198 | 66.00 |
| Hanoi | 48 | 16.00 |
| Saigon | 5 | 1.67 |
| Others | 49 | 16.33 |
| Nationality |
|
|
| Viet Nam | 256 | 85.33 |
| Foreigners | 44 | 14.67 |