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This figure shows that the degree and trend of correlation among variable cervical radiologic parameters (occipital slope [Os], C2 slope [C2s], C7 slope [C7s], T1 slope [T1s], T1 slope minus cervical lordosis [T1s-CL], C2-7 angle [C2-7A], cranio-vertebral angle [CVA], C2-7 sagittal vertical axis [C2-7SVA]) in Table 4 (pre-operation). T1s-CL and C2s have very similar degrees and trends of correlation with other parameters and C7s and T1s also show very similar patterns of correlation.
