Table 4 Effects of Sagittal Alignment Parameters on Heterotopic Ossification After Cervical Disc Replacement

 CL (°)

16.2 ± 8.8

13.3 ± 9.1

0.087

15.2 ± 8.9

15.7 ± 9.1

0.778

 SA (°)

1.3 ± 5.4

0.7 ± 2.9

0.310

0.8 ± 4.4

1.8 ± 5.4

0.255

 SVA (mm)

15.5 ± 7.3

20.4 ± 7.7

0.003^a

17.3 ± 7.6

16.2 ± 7.9

0.368

 T1s (°)

27.5 ± 7.3

27.8 ± 5.7

0.710

27.6 ± 6.8

27.5 ± 6.9

0.659

 T1s-CL (°)

11.2 ± 8.4

14.5 ± 6.5

0.014^a

12.4 ± 8.0

11.8 ± 8.2

0.573

 CL (°)

12.9 ± 8.1

11.4 ± 8.6

0.439

12.4 ± 8.3

12.6 ± 8.3

0.881

 SA (°)

−2.3 ± 5.3

−2.8 ± 4.1

0.615

−3.2 ± 4.8

−1.1 ± 5.1

0.020^a

 SVA (mm)

15.2 ± 5.9

20.3 ± 8.5

0.001^a

17.6 ± 8.0

15.1 ± 5.0

0.032^a

 T1s (°)

23.0 ± 9.8

20.4 ± 11.9

0.415

22.8 ± 11.1

21.5 ± 9.5

0.458

 T1s-CL (°)

10.1 ± 11.7

9.0 ± 13.3

0.833

10.4 ± 11.2

8.9 ± 13.7

0.940