Table 3. Demographic characteristics of participants (N=785).
| Variables | Group | N | % |
| Guardians’ information | |||
| Relationship (with the child) | Father | 209 | 26.62 |
| Mather | 512 | 65.23 | |
| Others | 64 | 8.15 | |
| Education | ≤High school | 380 | 48.66 |
| College | 357 | 45.71 | |
| Higher than college | 44 | 5.63 | |
| Annual household income (CNY in thousand) | <100 | 142 | 18.51 |
| 100–200 | 193 | 25.16 | |
| ≥200 | 75 | 9.78 | |
| Unclear | 357 | 46.54 | |
| Willingness to take children participate in caries prevention? | No | 48 | 8.15 |
| Yes | 511 | 86.76 | |
| Unclear | 30 | 5.09 | |
| Child’s information | |||
| Sex | Girl | 446 | 56.82 |
| Boy | 339 | 43.18 | |
| Grade | ≤First grade | 374 | 47.64 |
| ≥Second grade | 411 | 52.36 | |
| Had caries before | No | 588 | 75.10 |
| Yes | 180 | 22.99 | |
| Unclear | 15 | 1.91 | |
| Whether anticaries measures have been taken? | No | 589 | 75.32 |
| Yes | 176 | 22.51 | |
| Unclear | 17 | 2.17 | |
| Oral health status | Healthy without caries | 204 | 25.99 |
| Mild caries | 292 | 37.20 | |
| Moderate caries | 226 | 28.79 | |
| Severe caries | 63 | 8.03 |
CNYChinese yuan