Radiological characteristics of CM-1 patients with and without craniovertebral junction abnormalities.
| Radiological characteristics and Decompression | CVJ + | CVJ - | Total (n=64) | P-value |
|---|---|---|---|---|
| n (%) | ||||
| Syringomyelia$ | 19 (37) | 0 (0) | 19 (32) | 0.045 |
| Hydrocephalus$ | 13 (24) | 1 (11) | 14 (22) | 0.399 |
| Length of supraocciput* | 39.5 (6.20) | 40.0 (12.30) | 39.6 (6.45) | 0.757 |
| Twining’s line^ | 82.0±9.1 | 82.0±3.1 | 82.0±8.5 | 0.993 |
| Length of McRae’s line^ | 34.1±4.3 | 35.52±3.8 | 34.3±4.3 | 0.365 |
| Length of Chamberlain line^ | 74.3±7.5 | 76.3±5.9 | 74.5±7.2 | 0.435 |
| Degree of tonsillar displacement^ | 11.3±5.3 | 12.7±6.0 | 11.5±5.4 | 0.458 |
| The length of the clivus^ | 32.1±5.0 | 38.2±4.4 | 33.0±5.4 | 0.001 |
| NTB angle^ | 134.7±6.4 | 125.9±4.8 | 133.5±6.9 | <.001 |
| CC angle^ | 152.9±9.0 | 158.8±4.3 | 153.7±8.7 | 0.058 |
| Decompression | 18 (33) | 1 (11) | 19 (29) | 0.260 |
| $n(%),*Median (IQR),^Mean ±SD, CVJ+ - With craniovertebral junction abnormalities, CVJ- - Without craniovertebral junction abnormalities | ||||