Cervical Sagittal Imbalance after Cervical Laminoplasty in Elderly Patients

Table 2

Change in sagittal alignment parameters in patients after laminoplasty (1-year follow-up).

	Elderly group (30 cases)				Young age group (30 cases)
	Preoperative	Postoperative			Preoperative	Postoperative
C2-7 SVA	2.09	3.39	1.30	<0.01	2.31	2.94	0.63	<0.01
CL	13.98	13.04	-0.94	0.402	12.59	14.03	1.44	0.234
T1 slope	26.16	28.84	2.68	0.075	25.43	28.10	2.66	<0.01
T1 slope-CL	13.22	17.19	3.97	0.017	12.91	14.73	1.81	0.112

The postoperative change of C2-7 SVA tended to be greater than preoperative values in both age groups. In the older group, C2-7 SVA and T1 slope-CL were significantly changed postoperatively ( and , respectively). In the younger group, C2-7 SVA and T1 slope were significantly changed ( and ). C2-7 SVA: C2-7 sagittal vertical axis; CL: cervical lordosis; T1 slope-CL: T1 slope minus cervical lordosis. . , statistically significant.