Figure 1
Figure 2
Distribution of orthodontic treatment need in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to dentition type and previous orthodontic treatment, with the ICON cut-off point of 43_
| Dentition type | Previous treatment | ICON cut-off point of 43 | Total | p | ||
|---|---|---|---|---|---|---|
| No treatment need Treatment needed | ||||||
| Mixed | No | N | 264 | 136 | 400 | |
| % | 66.0 | 34.0 | 100.0 | |||
| Yes | N | 17 | 11 | 28 | 0.545 | |
| % | 60.7 | 39.3 | 100.0 | |||
| Total | N | 281 | 147 | 428 | ||
| % | 65.7 | 34.3 | 100.0 | |||
| Permanent | No | N | 1115 | 236 | 1351 | |
| % | 82.5 | 17.5 | 100.0 | |||
| Yes | N | 326 | 79 | 405 | 0.376 | |
| % | 80.5 | 19.5 | 100.0 | |||
| Total | N | 1441 | 315 | 1756 | ||
| % | 82.1 | 17.9 | 100.0 | |||
Distribution of the ICON degrees with cut-off point of 43 between dentition types within the DAI categories (0=Normal, 1=Definite, 2=Severe, 3=Handicapping)_
| DAI categories | Dentition type | ICON cut-off point of 43 | Total | p Fischer exact test | OR (95% CI) | τ-b | ||
|---|---|---|---|---|---|---|---|---|
| No treatment need | Treatment needed | |||||||
| 0 | Mixed | N | 179 | 48 | 227 | |||
| % | 78.9 | 21.1 | 100.0 | |||||
| Permanent | N | 1265 | 115 | 1380 | ||||
| % | 91.7 | 8.3 | 100.0 | <0.001 | 2.54(1.87-3.45) | -0.148 | ||
| Total | N | 1444 | 163 | 1607 | ||||
| % | 89.9 | 10.1 | 100.0 | |||||
| 1 | Mixed | N | 79 | 36 | 115 | |||
| % | 68.7 | 31.3 | 100.0 | |||||
| Permanent | N | 277 | 94 | 371 | 0.228 | 1.24(0.90-1.71) | -0.057 | |
| % | 74.7 | 25.3 | 100.0 | |||||
| Total | N | 356 | 130 | 486 | ||||
| % | 73.3 | 26.7 | 100.0 | |||||
| 2 | Mixed | N | 29 | 38 | 67 | |||
| % | 43.3 | 56.7 | 100.0 | |||||
| Permanent | N | 110 | 68 | 178 | ||||
| % | 61.8 | 38.2 | 100.0 | 0.014 | 1.49(1.12-1.97) | -0.167 | ||
| Total | N | 139 | 106 | 245 | ||||
| % | 56.7 | 43.3 | 100.0 | |||||
| 3 | Mixed | N | 24 | 44 | 68 | |||
| % | 35.3 | 64.7 | 100.0 | |||||
| Permanent | N | 92 | 99 | 191 | ||||
| % | 48.2 | 51.8 | 100.0 | 0.088 | 1.25(0.99-1.56) | -0.114 | ||
| Total | N | 116 | 143 | 259 | ||||
| % | 44.8 | 55.2 | 100.0 | |||||
Distribution of the ICON categories (0=Easy, 1=Mild, 2=Moderate, 3=Difficult, 4=Very Difficult) in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to dentition type and previous orthodontic treatment_
| Dentition type | Previous treatment | ICON complexity | Total | p χ2 test | |||||
|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | |||||
| Mixed | No | N | 143 | 166 | 47 | 23 | 21 | 400 | |
| % | 35.8 | 41.5 | 11.8 | 5.8 | 5.3 | 100.0 | |||
| Yes | N | 10 | 10 | 5 | 2 | 1 | 28 | ||
| % | 35.7 | 35.7 | 17.9 | 7.1 | 3.6 | 100.0 | 0.870 | ||
| Total | N | 153 | 176 | 52 | 25 | 22 | 428 | ||
| % | 35.7 | 41.1 | 12.1 | 5.8 | 5.1 | 100.0 | |||
| Permanent | No | N | 737 | 469 | 72 | 45 | 28 | 1351 | |
| % | 54.6 | 34.7 | 5.3 | 3.3 | 2.1 | 100.0 | |||
| Yes | N | 221 | 129 | 27 | 17 | 11 | 405 | 0.561 | |
| % | 54.6 | 31.9 | 6.7 | 4.2 | 2.7 | 100.0 | |||
| Total | N | 958 | 598 | 99 | 62 | 39 | 1756 | ||
| % | 54.6 | 34.1 | 5.6 | 3.5 | 2.2 | 100.0 | |||
Distribution of the DAI categories (0=Normal, 1=Definite, 2=Severe, 3=Handicapping) in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to previous orthodontic treatment_
| Dentition type | Previous treatment | ICON complexity | Total | p χ2 test | ||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |||||
| Mixed | No | N | 191 | 104 | 54 | 60 | 409 | |
| % | 46.7 | 25.4 | 13.2 | 14.7 | 100.0 | |||
| Yes | N | 18 | 5 | 2 | 3 | 28 | ||
| % | 64.3 | 17.9 | 7.1 | 10.7 | 100.0 | 0.343 | ||
| Total | N | 209 | 109 | 56 | 63 | 437 | ||
| % | 47.8 | 24.9 | 12.8 | 14.4 | 100.0 | |||
| Permanent | No | N | 925 | 243 | 109 | 97 | 1374 | |
| % | 67.3 | 17.7 | 7.9 | 7.1 | 100.0 | |||
| Yes | N | 265 | 70 | 31 | 48 | 414 | ||
| % | 64.0 | 16.9 | 7.5 | 11.6 | 100.0 | 0.032 | ||
| Total | N | 1190 | 313 | 140 | 145 | 1788 | ||
| % | 66.6 | 17.5 | 7.8 | 8.1 | 100.0 | |||