Zhang X, Gao Y, Gao K, et al. - This study was attempted to assess the factors correlated with axial symptom using multivariable analysis. Two-hundred forty-nine patients were retrospectively assessed who treated by open-door laminoplasty. Individuals were divided into two groups: axial symptom and no axial symptom group. The results of this study showed that longer collar wear time, larger preoperative and postoperative C2 sagittal vertical axis were positively associated with the higher incidence of axial symptom.