Table 3. Comparison of outcomes between 1- and 2-level corpectomy.

	one year follow-up	Last follow-up
Reduction of segmental height (mm)
1-level corpectomy	1.26 ± 0.64	1.68 ± 0.76
2-level corpectomy	1.54 ± 0.61	1.88 ± 0.60
p value	0.204	0.419
Fusion rate
1-level corpectomy	92.31% (36/39)	97.44% (38/39)
2-level corpectomy	90.9% (10/11)	100% (11/11)
p value	0.643	0.78
Subsidence rate
1-level corpectomy	2.56% (1/39)	7.69% (3/39)
2-level corpectomy	9.1% (1/11)	9.1% (1/11)
p value	0.395	0.643
Incidence of symptomatic ASD
1-level corpectomy	0% (0/39)	5.13% (2/39)
2-level corpectomy	0% (0/11)	9.09% (1/11)
p value		0.534
Incidence of radiolucent gap
1-level corpectomy	56.41% (22/39)	58.97% (23/39)
2-level corpectomy	54.55% (6/11)	72.73% (8/11)
p value	0.912	0.632
JOA increase
1-level corpectomy	2.59 ± 1.55	2.67 ± 1.74
2-level corpectomy	3.00 ± 1.00	2.91 ± 1.22
p value	0.413	0.668
VAS decrease
1-level corpectomy	3.26 ± 1.31	3.21 ± 1.49
2-level corpectomy	3.91 ± 0.83	3.91 ± 1.04
p value	0.126	0.150