| Residence |
| Urban area | 857 (69.3) | | |
| Rural area | 599 (69.9) | 1.033 (0.839 - 1.272) | 0.761 |
| Age (year) |
| From 18 to 29 | 798 (66.8) | Ref | |
| From 30 to 39 | 388 (72.0) | 0.946 (0.653 - 1.369) | 0.767 |
| From 40 to 49 | 209 (74.9) | 1.144 (0.724 - 1.807) | 0.566 |
| 50 and above | 61 (76.2) | 1.236 (0.641 - 2.383) | 0.526 |
| Ethnicity |
| Kinh | 1147 (68.9) | Ref | |
| Other | 309 (72.2) | 1.170 (0.910 - 1.504) | 0.221 |
| Sex |
| Male | 448 (73.7) | Ref | |
| Female | 1008 (67.9) | 0.800 (0.638 - 1.003) | 0.053 |
| Occupation |
| Health staff | 320 (81.2) | Ref | |
| Worker | 66 (65.3) | 0.475 (0.281 - 0.802) | 0.005 |
| Other governmental staff | 325 (70.2) | 0.505 (0.359 - 0.712) | 0.000 |
| Student | 541 (66.5) | 0.615 (0.419 - 0.902) | 0.013 |
| Own business | 50 (68.5) | 0.652 (0.362 - 1.172) | 0.153 |
| Others | 154 (62.1) | 0.472 (0.320 - 0.697) | 0.000 |
| Education |
| High school or lower | 275 (64.0) | Ref | |
| Above | 1181 (71.0) | 1.144 (0.887 - 1.475) | 0.300 |
| Marital status |
| Single | 730 (66.0) | Ref | |
| Married | 682 (73.8) | 1.152 (0.792 - 1.676) | 0.460 |
| Divorced/ Widowed | 44 (69.8) | 1.091 (0.570 - 2.088) | 0.793 |
| Family size |
| One | 45 (61.6) | Ref | |
| Two | 55 (60.4) | 0.937 (0.485 - 1.810) | 0.846 |
| From three people | 1356 (70.3) | 1.426 (0.850 - 2.394) | 0.179 |
| Family economic status |
| Poor/near poor | 55 (54.5) | Ref | |
| Others (average, high income) | 1401 (70.3) | 1.636 (1.062 - 2.518) | 0.025 |
| Chronic disease |
| No | 1371 (69.6) | | |
| Yes | 85 (68.5) | 0.816 (0.535 - 1.244) | 0.344 |
| Allergy |
| Yes | 386 (65.1) | Ref | |
| No | 907 (72.5) | 1.309 (1.052 - 1.629) | 0.016 |
| Do not know/remember | 163 (65.5) | 1.090 (0.790 - 1.505) | 0.599 |
| Occupational changes due to COVID-19 |
| Yes | 326 (59.5) | Ref | |
| No | 1130 (73.1) | 1.626 (1.273 - 2.077) | 0.000 |
| Income reduction due to COVID-19 |
| Yes | 507 (65.2) | Ref | |
| No | 949 (72.2) | 1.073 (0.852 - 1.351) | 0.552 |
| F Current contact level* |
| F1, F2 | 47 (60.3) | Ref | |
| F3, F4 | 160 (67.2) | 1.035 (0.587 - 1.827) | 0.905 |
| None | 1249 (70.3) | 1.245 (0.753 - 2.059) | 0.393 |
| Previous three waves contact (F1 to F4)* |
| Yes | 135 (67.8) | Ref | |
| No | 1321 (69.7) | 1.057 (0.761 - 1.467) | 0.743 |
| Feeling of being at risk of COVID-19 infection in the near future |
| Yes | 385 (73.1) | Ref | |
| No | 302 (68.2) | 0.827 (0.616 - 1.112) | 0.209 |
| Do not know | 769 (68.5) | 0.867 (0.680 - 1.105) | 0.249 |