Table 3.

The change of cephalad adjacent segment degeneration

Variable	PS Group	CBT Group	p Value
	mean ± SD	mean ± SD
6 months △ISH (mm)	0.94 ± 1.18	0.08 ± 1.11	0.00
6 months △FH (mm)	1.20 ± 2.95	0.45 ± 1.67	0.03
6 months △FW (mm)	1.16 ± 1.26	-0.03 ± 1.36	0.00
6 months △ROM (°)	0.88 ± 1.01	0.36 ± 0.89	0.12
Last FU △ISH (mm)	1.48 ± 0.90	0.32 ± 1.03	0.00
Last FU △FH (mm)	2.16 ± 2.80	0.69 ± 1.68	0.00
Last FU △FW (mm)	2.31 ± 1.60	0.48 ± 1.70	0.00
Last FU △ROM (°)	2.70 ± 1.87	0.89 ± 0.57	0.02