Evaluation of MR imaging criteria for indicating extraligamentous HIVD in the lumbar spine
| MR Imaging Criteria | Sensitivity (%) | Specificity (%) | Accuracy (%) | P Value |
|---|---|---|---|---|
| Presence of disk migration | 50/66 (75.8) | 20/51 (39.2) | 70/117 (59.8) | .0817 |
| Budding appearance in HIVD | 15/66 (22.7) | 43/51 (84.3) | 58/117 (49.6) | .3427 |
| Spinal canal compromised for more than half its dimension | 30/66 (45.5) | 42/51 (82.4) | 72/117 (61.5) | .0015 |
| Internal signal difference in HIVD | 23/66 (34.8) | 42/51 (82.4) | 65/117 (55.6) | .0385 |
| Ill-defined margin of HIVD | 10/66 (15.2) | 49/51 (96.1) | 59/117 (50.4) | .0471 |
| Disruption of continuous low-signal-intensity line covering HIVD | 38/66 (57.6) | 40/51 (78.4) | 78/117 (66.7) | <.0001 |
| Presence of internal dark line in HIVD | 20/66 (30.3) | 46/51 (90.2) | 66/117 (56.4) | .0072 |
| Adjacent bone marrow corner erosion | 35/66 (53.0) | 29/51 (56.9) | 64/117 (48.6) | .2877 |
| Bone marrow corner edema | 19/66 (28.8) | 42/51 (82.4) | 61/117 (52.1) | .1615 |
| Severe height loss of original disk | 61/66 (92.4) | 6/51 (11.8) | 67/117 (57.3) | .3238 |