Table 5.

Patient Characteristics and Unadjusted and Adjusted Associations With Overall Survival.

	Unadjusted			Adjusted
Variable	HR	95% CI	P-value	HR	95% CI	P-value
Age (years)	0.94	0.83-1.06	0.31	0.98	0.85-1.13	0.80
Length of Construct (# of levels)	1.11	0.93-1.33	0.24	1.09	0.82-1.45	0.57
Surgery time (minutes)	1.00	0.99-1.00	0.37	0.99	0.98-0.999	0.02
Blood loss (mL)	1.0005	0.99 997-1.00 096	0.07	1.0007	1.00 003-1.001	0.04
Decompression
No	ref	—	—	ref	—	—
Yes	2.12	0.90-5.03	0.09	7.46	1.28-43.46	0.03
Index Level
Thoracic	ref	—	—	ref	—	—
Cervical/Cervicothoracic	1.93	0.89-4.22	0.10	2.52	1.05-6.05	0.04
Lumbar/Thoracolumbar	0.96	0.50-1.83	0.90	1.01	0.51-1.99	0.98
MIS
No	ref	—	—	ref	—	—
Yes	0.56	0.25-1.26	0.16	5.57	0.91-34.08	0.06

Abbreviations: CI, confidence interval; mL, milliliters; MIS, minimally invasive surgery; HR, hazard ratio; ref, reference.

Boldface values indicates statistically significant.