The weight scores and descriptive results of each oral health behaviour item
| Items | Answer options | Weight scores | N (%) |
| Daily brushing times | 0 | 0 | 31 (4.8) |
| Once | 1 | 164 (25.2) | |
| Twice or more | 2 | 456 (70.0) | |
| Surfaces brushed when brushing teeth | One surface and below or two surfaces | 0 | 164 (25.2) |
| Three surfaces | 1 | 135 (20.7) | |
| Four surfaces | 2 | 352 (54.1) | |
| Duration of each brushing | <1 min | 0 | 114 (17.5) |
| ≥1 min and <2 min | 1 | 224 (34.4) | |
| ≥2 min | 2 | 313 (48.1) | |
| Frequency of changing toothbrush and brush head | One month or less/1 month to 3 months (inclusive) | 1 | 379 (58.2) |
| Three months to 6 months ((inclusive)/>6 months | 0 | 272 (41.8) | |
| Frequency of gargling after meals | Never | 0 | 208 (32.0) |
| Sometimes (frequency <50%） | 1 | 216 (33.2) | |
| Often (frequency ≥50%)/gargle after every meal or every eating (including snacks) | 2 | 227 (34.8) | |
| Frequency of flossing | Never | 0 | 420 (64.5) |
| Sometimes (frequency <50%) | 1 | 162 (24.9) | |
| Often (frequency ≥50%)/floss after every meal or every eating (including snacks) | 2 | 69 (10.6) | |
| Frequency of desserts intake | Never | 2 | 54 (8.3) |
| (biscuits, cakes, breads, etc) | ≤Once a week | 1 | 321 (49.3) |
| ≥Twice a week | 0 | 276 (42.4) | |
| Frequency of sweet drinks intake (carbonated drinks, fruit juices, etc) | Never | 2 | 141 (21.7) |
| ≤Once a week | 1 | 396 (60.8) | |
| ≥Twice a week | 0 | 114 (17.5) | |
| Frequency of other drinks intake (sweetened milk, yoghurt, etc) | Never | 2 | 164 (25.2) |
| ≤Once a week | 1 | 278 (42.7) | |
| ≥Twice a week | 0 | 209 (32.1) |