Two orthopedic surgeons independently ealuated the sagittal alignment in each group twice using CCL, C1-C7 Cobb, C2-C7 Cobb, sagittal tangent, and the Ishihara methods.

• 两位骨科医师独立的评估矢状面在每组中2次，应用CCL法,C1-C7Cobb角法,C2-C7Cobb角法，矢状切线法，和Ishihara方法。