The proportion of correctly response to oral health knowledge and the level of self-efficacy
| Items | N | % | Mean±SD |
| Oral health knowledge | |||
| Gingival bleeding is normal when brushing your teeth (K1)40 42 44 | 351 | 54.8 | |
| Bacteria can cause gum inflammation (K2)41 | 361 | 56.3 | |
| Good brushing habits do not prevent gum inflammation (K3)40 42 44 | 353 | 55.1 | |
| Bacteria can cause tooth decay (K4)41 | 331 | 51.6 | |
| Eating too much sugar can cause tooth decay (K5)40–42 | 423 | 66.0 | |
| Fluoride does not protect dental health (K6)40–42 | 206 | 32.1 | |
| Pit and fissure sealing does not protect dental health (K7)43 | 249 | 38.8 | |
| Oral diseases may affect overall health (K8)42 43 | 278 | 43.4 | |
| Oral health-related self-efficacy | |||
| Self-efficacy in brushing their teeth morning and evening | 6.31±1.37 | ||
| Self-efficacy in gargling the mouth after meals | 5.86±1.72 | ||
| Self-efficacy in having regular oral health examinations | 5.94±1.61 | ||
| Self-efficacy in participating in oral health education activities at school | 6.11±1.55 |