Table 2 Pairwise differences of cervical sagittal parameters between DR and MRI

OI (°)

15.38 (2.32)

16.68 (4.33)

 − 1.29 (4.38)

0.063

OT (°)

12.51 (6.18)

5.44 (6.51)

7.07 (7.39)

 < 0.001

C2S (°)

2.80 (6.36)

11.40 (6.83)

 − 8.60 (7.03)

 < 0.001

C0-2 (°)

24.60 (9.47)

15.03 (6.26)

9.57 (9.68)

 < 0.001

C2-7 (°)

20.76 (9.73)

12.24 (10)

8.52 (9.59)

 < 0.001

T1S (°)

31.71 (8.40)

28.37 (7.21)

3.34 (7.42)

0.006

T1S-CL (°)

10.95 (8.21)

16.13 (8.17)

 − 5.19 (7.95)

 < 0.001