Comparison of the posterior cervical paravertebral muscle volumes.
| Muscle Volume (cm2) | MP Group (n = 22) | LP Group (n = 46) | P Value |
| Open-door side | |||
| Preoperation | 76.84 ± 6.23 | 77.69 ± 7.21 | 0.82 |
| Postoperation | 65.23 ± 5.22 | 66.79 ± 4.67 | 0.42 |
| 1-year follow-up | 72.61 ± 5.24 | 73.23 ± 5.12 | 0.79 |
| Hinge side | |||
| Preoperation | 76.62 ± 6.11 | 77.42 ± 6.75 | 0.78 |
| Postoperation | 75.27 ± 5.83 | 68.54 ± 5.48 | <0.01 |
| 1-year follow-up | 76.22 ± 4.96 | 74.63 ± 6.74 | <0.01 |
Note: Data are expressed as the mean ± SD. Boldface indicates statistically significant findings.
LP Group, traditional open-door laminoplasty-treated patients; MP Group, haplo-paraspinal-muscle-preserving laminoplasty-treated patients.