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| MRI | Total (n) | ||||
|---|---|---|---|---|---|
| Normal (n) | Bulging (n) | Protrusion (n) | Extrusion (n) | ||
| MDCT | |||||
| Normal (n) | 104 | 9 | 8 | 0 | 121 |
| Bulging (n) | 5 | 34 | 18 | 1 | 58 |
| Protrusion (n) | 6 | 11 | 50 | 3 | 70 |
| Extrusion (n) | 0 | 1 | 3 | 2 | 6 |
| Total (n) | 115 | 55 | 79 | 6 | 255 |
k = 0.66 (95% confidence interval, 0.62-0.68). MDCT = multidetector-row computed tomography, MRI = magnetic resonance imaging
