Table 2.
Relationship between age, gender, and assessed orthodontic treatment need according to the Index of Complexity, Outcome, and Need.
| Variable | ICON assessment of need (%) | χ 2 | Odd ratio | 95% CI | P | ||
|---|---|---|---|---|---|---|---|
| Need (n = 233) | No need (n = 379) | Lower | Upper | ||||
| Age (years) | |||||||
| 12 | 26 (28.0) | 67 (72.0) | 4.76 | 0.58 | 0.35 | 0.97 | 0.03* |
| 13 | 22 (27.5) | 58 (72.5) | 4.36 | 0.58 | 0.33 | 1.00 | 0.04* |
| 14 | 36 (38.7) | 57 (61.3) | 0.02 | 1.03 | 0.64 | 1.66 | 0.89 |
| 15 | 34 (45.3) | 41 (54.7) | 1.91 | 1.41 | 0.84 | 2.36 | 0.17 |
| 16 | 37 (37.4) | 62 (62.6) | 0.02 | 0.97 | 0.60 | 1.54 | 0.88 |
| 17 | 54 (50.0) | 54 (50.0) | 7.91 | 1.82 | 1.17 | 2.82 | 0.01* |
| 18 | 24 (37.5) | 40 (62.5) | 0.01 | 0.97 | 0.55 | 1.71 | 0.92 |
| Gender | |||||||
| Male | 130 (43.5) | 169 (56.5) | 7.25 | 1.57 | 1.11 | 2.21 | 0.01* |
| Female | 103 (32.9) | 210 (67.1) | 7.25 | 0.64 | 0.45 | 0.90 | 0.01* |
*Significant.