Table 10.
Chi-square test; prevalence of the mandibular condyle shapes by age
| Variable | Shapes | Age ≤ 20 yr | 21 yr ≤ Age < 30 yr | Age ≥ 30 yr | Total (%) | p-value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Left (%) | Right (%) | Left (%) | Right (%) | Left (%) | Right (%) | Left | Right | |||||
| Coronal condyle shape | Angled | 26.5 | 26.5 | 23.7 | 25 | 20 | 20 | 24.0 | 0.253 | 0.255 | ||
| Concave | 0.0 | 0.0 | 7.9 | 7.9 | 12 | 12 | 6.6 | |||||
| Convex | 35.3 | 35.3 | 36.8 | 35.5 | 32 | 32 | 35.1 | |||||
| Flattened | 8.8 | 8.8 | 6.6 | 6.6 | 0.0 | 0.0 | 5.9 | |||||
| Round | 29.4 | 29.4 | 25 | 25 | 36 | 36 | 28.1 | |||||
| Sagittal condyle shape | Bird beak | 17.6 | 23.5 | 11.8 | 15.8 | 28 | 36 | 18.9 | 0.394 | 0.363 | ||
| Crooked finger | 2.9 | 2.9 | 11.8 | 9.2 | 8 | 8 | 8.1 | |||||
| Diamond | 17.6 | 17.6 | 19.7 | 19.7 | 20 | 20 | 19.3 | |||||
| Oval | 61.8 | 55.9 | 56.6 | 55.3 | 44 | 36 | 53.7 | |||||