Increased Neck Tilt/T1 slope ratio may play an important role in patients with cervical kyphosis

Table 3 Cervical sagittal alignment parameters

Item	Preoperative	Postoperative	Follow-up	p value	p* value
T1s (°)	20.73 ± 8.31	21.45 ± 7.74	23.35 ± 5.00	0.081	0.352
NT (°)	47.35 ± 5.00	45.65 ± 10.07	46.08 ± 9.61	0.386	0.675
C2-7 Cobb (°)	-5.93 ± 3.00	9.67 ± 6.61	7.91 ± 8.73	0.000	0.022
C2-7 SVA (cm)	1.41 ± 1.07	1.75 ± 0.71	1.43 ± 1.28	0.078	0.083
VAS	6.97 ± 0.85	3.03 ± 0.70	2.92 ± 0.69	0.000	0.487
NDI	18.53 ± 3.03	10.58 ± 2.63	10.11 ± 2.18	0.000	0.409

Postoperative, within 1 week after surgery; Follow-up, at least 36 months after the surgery; p value, comparison between preoperative and postoperative values
T1s T1 slope, NT neck tilt, C2-7 SVA C2-7 sagittal vertical axis, VAS visual analogue scale, NDI neck disability index
*p value, comparison between postoperative and follow-up values

ISSN: 1471-2474