| Residence |
| Urban area | 857 (69.3) | | |
| Rural area | 608 (70.9) | 0.995 (0.812 - 1.220) | 0.962 |
| Age (year) |
| From 18 to 29 | 821 (68.7) | | |
| From 30 to 39 | 388 (72.0) | 1.176 (0.816 - 1.695) | 0.384 |
| From 40 to 49 | 197 (70.6) | 1.169 (0.749 - 1.824) | 0.492 |
| 50 and above | 59 (73.8) | 1.241 (0.664 - 2.317) | 0.498 |
| Ethnicity |
| Kinh | 1157 (69.5) | | |
| Other | 308 (72.0) | 0.867 (0.683 - 1.101) | 0.242 |
| Sex |
| Male | 440 (72.4) | | |
| Female | 1025 (69.0) | 0.964 (0.775 - 1.199) | 0.743 |
| Occupation |
| Health staff | 307 (77.9) | | |
| Worker | 68 (67.3) | 0.578 (0.347 - 0.964) | 0.036 |
| Other governmental staff | 325 (70.2) | 0.709 (0.509 - 0.988) | 0.042 |
| Student | 564 (69.3) | 0.561 (0.386 - 0.816) | 0.002 |
| Own business | 50 (68.5) | 1.057 (0.576 - 1.939) | 0.857 |
| Others | 151 (60.9) | 0.547 (0.374 - 0.800) | 0.002 |
| Education |
| High school or lower | 289 (67.2) | | |
| Above | 1176 (70.7) | 1.121 (0.872 - 1.440) | 0.373 |
| Marital status |
| Single | 751 (67.9) | | |
| Married | 669 (72.4) | 0.824 (0.568 - 1.196) | 0.309 |
| Divorced/ Widowed | 45 (71.4) | 0.899 (0.471 - 1.716) | 0.747 |
| Family size |
| One | 49 (67.1) | | |
| Two | 60 (65.9) | 0.700 (0.359 - 1.365) | 0.295 |
| From three people | 1356 (70.3) | 1.116 (0.658 - 1.894) | 0.684 |
| Family economic status |
| Poor/near poor | 56 (55.4) | | |
| Others (average. high income) | 1409 (70.7) | 1.451 (0.944 - 2.232) | 0.090 |
| Chronic disease |
| No | 1384 (70.3) | | |
| Yes | 81 (65.3) | 0.602 (0.403 - 0.901) | 0.014 |
| Allergy |
| Yes | 405 (68.3) | | |
| No | 898 (71.8) | 1.295 (1.043 - 1.607) | 0.019 |
| Do not know/remember | 162 (65.1) | 0.967 (0.705 - 1.328) | 0.838 |
| Occupational changes due to COVID-19 |
| Yes | 339 (61.9) | | |
| No | 1126 (72.9) | 1.570 (1.232 - 2.001) | 0.000 |
| Income reduction due to COVID-19 |
| Yes | 508 (65.3) | | |
| No | 957 (72.8) | 1.110 (0.885 - 1.392) | 0.367 |
| F Current contact level* |
| F1. F2 | 49 (62.8) | | |
| F3. F4 | 168 (70.6) | 1.038 (0.582 - 1.852) | 0.900 |
| None | 1248 (70.2) | 0.926 (0.555 - 1.544) | 0.767 |
| Previous three waves contact (F1 to F4)* |
| Yes | 139 (69.8) | | |
| No | 1326 (70.0) | 0.961 (0.691 - 1.337) | 0.813 |
| Feeling of being at risk of COVID-19 infection in the near future |
| Yes | 385 (73.1) | | |
| No | 304 (68.6) | 0.684 (0.512 - 0.915) | 0.010 |
| Do not know | 776 (69.1) | 0.782 (0.614 - 0.995) | 0.046 |