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The 99% confidence limits of radiostereometry (RSA) in the cervical spine in 36 double examinations [14, 15]
| One level | Two levels | |
|---|---|---|
| Translations (mm) | ||
| Anterior-posterior | 0.56 | 0.43 |
| Proximal-distal | 0.27 | 0.34 |
| Medial-lateral | 0.81 | 0.85 |
| Rotations (degrees) | ||
| Transverse axis | 3.6 | 4.0 |
| Longitudinal axis | 4.2 | 3.7 |
| Sagittal axis | 1.3 | 2.0 |
