Table 3. Mean Parameters of the Odontoid Process and Comparison between Sexes.
| Variable | Male | Female | Total | p-value |
|---|---|---|---|---|
| METD (mm) | 10.0±1.1 | 9.2±1.0 | 9.5±1.1 | < 0.001 |
| MEAD (mm) | 12.0±1.0 | 11.0±1.0 | 11.5±1.1 | < 0.001 |
| MSL (mm) | 35.7±2.5 | 33.3±2.7 | 34.4±2.9 | < 0.001 |
| SPBA to apical odontoid (°) | 14.1±3.6 | 13.0±3.1 | 13.5±3.3 | 0.066 |
| SPBA to posterior odontoid tip (°) | 24.4±3.1 | 24.0±3.0 | 24.2±3.1 | 0.383 |
Values are presented as mean ± standard deviation.
METD: minimum external transverse diameter, MEAD: minimum external anteroposterior diameter, MSL: maximum screw length, SPBA: screw projection back angle.