[Table/Fig-9]:
Showing distribution of very difficult cases in Ethnic Chinese
| Very Difficult cases | |||
|---|---|---|---|
| Percentage | Significance | ||
| Gender | Male | 64 (16.1%) | .264 |
| Female | 334 (83.9%) | ||
| Age Range | 20-24 | 582 (74.9%) | .044 |
| 25-29 | 160 (20.6%) | ||
| 30-34 | 16 (2.0%) | ||
| 35-39 | 12(1.5%) | ||
| 40-44 | 7 (1%) | ||
| Spatial | Mesioangular | 324 (41.7%) | .001 |
| Horizontal/transverse | 238 (30.7%) | ||
| Vertical | 164 (21.1%) | ||
| Distoangular | 51 (6.5%) | ||
| Depth | High occlusal level | 39 (5.0%) | .001 |
| Medium occlusal level | 156 (20.1%) | ||
| Deep occlusal level | 582 (74.9%) | ||
| Ramus | Sufficient space | 8 (1.0%) | .001 |
| Reduced space | 156 (20.1%) | ||
| No space | 613 (78.9%) | ||