TABLE 3.
Summary statistics of MRI measurements*
| Diagnosis | Age (yrs) at MRI | Prepontine Space (mm)† | Obex (mm)‡ | AP Width of 4th Ventricle (mm) | Tentorial Angle (°) | AP Width of FM (mm) |
|---|---|---|---|---|---|---|
| CM-I | ||||||
|
| ||||||
| mean | 28.67 | 1.67 | −1.33 | 10.67 | 79 | 34.33 |
| median | 12.00 | 2 | 1 | 10 | 77 | 32 |
| SD | 28.87 | 0.58 | 4.93 | 1.15 | 5.29 | 4.93 |
|
| ||||||
| CM-0 | ||||||
|
| ||||||
| mean | 28.67 | 1.5 | 1.67 | 9.67 | 72.33 | 38 |
| median | 33.00 | 1.5 | 0 | 10 | 72 | 39 |
| SD | 14.01 | 0.5 | 2.89 | 0.58 | 7.51 | 2.65 |
*
Individuals 9448-0001, 9448-1001, 9453-0001, 9453-1001, 9509-0001, and 9509-0100 were included.
†
Prepontine space at sphenooccipital synchondrosis.
‡
Tip of obex to a midpoint on the basion-opisthion line.