Table 5. Logistic Regression on Presence of In-Hospital Complications after Cervical Fusion, PSM Matched Cohort.

* P < 0.05 is significant

C-statistic: 0.811

	Group	Odds Ratio	95% CI
Age	Single point increase	2.816	[1.894, 4.186]	*
Expected payer	Medicare v. private insurance	0.671	[0.445, 1.011]
	Other including Medicaid v. private Insurance	0.947	[0.709, 1.265]
Elixhauser comorbidity score	Single point increase	1.581	[1.476, 1.695]	*
ICISS probability of death	Single percentage point increase	1.062	[1.046, 1.078]	*
Sex	Male v. female	1.463	[1.143, 1.873]	*
Spinal cord injury	Yes (ICD-9, 806) v. no/unknown (ICD-9, 805)	3.169	[2.461, 4.079]	*
Surgical approach	Anterior (ICD-9, 81.02) v. posterior (ICD-9, 81.03)	0.916	[0.729, 1.152]
Time to surgery	Over 72 hours v. within 72 hours	1.273	[1.019, 1.589]	*
Urban-rural continuum	Large metropolitan v. nicropolitan	1.129	[0.644, 1.982]
	Small metropolitan v. micropolitan	1.222	[0.675, 2.213]