Table 2. Comparison of the clinical and radiological parameters between the myelopathy group and non-myelopathy group.
| Variables | Non-myelopathy group | Myelopathy group | P value |
|---|---|---|---|
| No. of patients | 79 | 81 | |
| Age (years) | 54.7±14.6 | 57.5±10.6 | 0.17 |
| Sex | 0.35 | ||
| Female | 35 | 30 | |
| Male | 44 | 51 | |
| DM | 13 | 17 | 0.46 |
| HTN | 24 | 18 | 0.24 |
| T2HIS | 2 | 63 | <0.01* |
| OLF extent | 2.3±1.0 | 2.5±1.2 | 0.35 |
| OLF location | 0.52 | ||
| Upper | 12 | 9 | |
| Middle | 15 | 12 | |
| Lower | 52 | 60 | |
| Radiological measurement | |||
| APD (mm) | 6.6±2.1 | 5.0±1.7 | <0.01* |
| CGP (%) | 51.2±16.3 | 37.3±12.9 | <0.01* |
| OLFA (mm2) | 46.4±24.0 | 80.2±32.7 | <0.01* |
| OLFA ratio (%) | 26.0±13.8 | 49.2±20.8 | <0.01* |
| OLFV (mm3) | 438.0±233.6 | 932.7±403.5 | <0.01* |
| OLFV ratio (%) | 18.6±9.3 | 40.2±13.2 | <0.01* |
*, statistically significant. DM, diabetes mellitus; HTN, hypertension; T2HIS, high intramedullary signal on T2-weighted MRI; OLF, ossification of the ligamentum flavum; APD, anteroposterior canal diameter; CGP, canal grade (paramedian); OLFA, OLF area; OLFV, OLF volume.