Oral health and oral health behaviour between children from low-income (utilising the ‘Maximum Bill’) and middle-to-high-income families
| Maximum Bill | N | Mean | SD | Mean diff. | 95% CI | p Value | |
| Mean plaque index (missing=1) | No | 1602 | 0.41 | 0.48 | −0.17 | (−0.23 to −0.12) | <0.001 |
| Yes | 351 | 0.59 | 0.58 | ||||
| DMFt (D1-level) (missing=1) | No | 1601 | 1.68 | 2.05 | −1.12 | (−1.36 to −0.87) | <0.001 |
| Yes | 352 | 2.79 | 2.43 | ||||
| DMFt (D3-level) (missing=2) | No | 1600 | 0.78 | 1.42 | −0.47 | (−0.64 to −0.30) | <0.001 |
| Yes | 352 | 1.25 | 1.68 | ||||
| DMFs (D1-level) (missing=0) | No | 1602 | 2,30 | 3.25 | −1.72 | (−2.11 to −1.32) | <0.001 |
| Yes | 352 | 4,02 | 4.07 | ||||
| DMFs (D3-level) (missing=0) | No | 1602 | 1,18 | 2.51 | −0.83 | (−1.13 to −0.52) | <0.001 |
| Yes | 352 | 2,00 | 3.16 | ||||
| Care index* (missing=0) | No | 544 | 70.33 | 42.14 | 11.87 | (4.47 to 19.27) | <0.001 |
| Yes | 170 | 58.46 | 45.17 | ||||
| Treatment index* (missing=0) | No | 544 | 73.13 | 40.83 | 8.34 | (1.18 to 15.51) | 0.02 |
| Yes | 170 | 64.79 | 43.75 | ||||
| Restorative index* (missing=0) | No | 537 | 72.18 | 41.57 | 9.96 | (2.54 to 17.38) | 0.01 |
| Yes | 164 | 62.22 | 44.79 | ||||
| Knowledge (missing=183) | No | 1483 | 7.58 | 2.12 | 0.80 | (0.52 to 1.07) | <0.001 |
| Yes | 288 | 6.78 | 2.49 | ||||
| Attitude (missing=183) | No | 1482 | 8.37 | 1.32 | 0.27 | (0.10 to 0.44) | 0.002 |
| Yes | 289 | 8.10 | 1.44 |
↵*Of those having DMFt >0.