Table 2.

Multivariate survival analysis.

	95% Confidence interval
	Hazard ratio	lower	upper	p-value
Perineural invasion
None	Reference
Present	1.38	1.20	1.57	<0.001
Age
18–59	Reference
60–69	1.38	1.20	1.57	<0.001
70–79	1.68	1.44	1.98	<0.001
80–90	2.72	2.32	3.19	<0.001
Sex
Male	Reference
Female	0.78	0.73	0.84	<0.001
Race
White (non-Hispanic)	Reference
Black (non-Hispanic)	1.03	0.92	1.16	0.575
Other (non-Hispanic)	1.02	0.81	1.27	0.893
Hispanic	1.01	0.90	1.14	0.848
Insurance
Private	Reference
Medicare	1.27	1.14	1.41	<0.001
Medicaid and other government	1.56	1.28	1.91	<0.001
Unknown	1.37	1.01	1.87	0.043
Not ensured	1.39	1.07	1.80	0.013
Median income
<58,000	Reference
58,000 -74,000	1.02	0.92	1.12	0.766
74,000 - 93,000	0.94	0.85	1.04	0.241
>93,000	0.87	0.78	0.96	0.006
Comorbidities
CCI score 0	Reference
CCI score 1	1.34	1.24	1.44	<0.001
CCI score 2	2.11	1.93	2.31	<0.001
Facility type
Community	Reference
Comprehensive community	1.00	0.92	1.09	1.000
Academic/research	0.94	0.85	1.03	0.188
Other	0.97	0.50	1.87	0.917
Facility location
Northeast	Reference
South	0.99	0.90	1.09	0.873
Midwest	0.98	0.89	1.08	0.661
West	0.99	0.88	1.11	0.884
Surgery type
Partial or hemicolectomy	Reference
Total colectomy	1.44	1.25	1.67	<0.001
TNM: T
T1	Reference
T2	1.15	1.01	1.31	0.031
T3	1.49	1.32	1.67	<0.001
T4	2.91	2.51	3.37	<0.001
Adjuvant therapy
None	Reference
Chemotherapy	0.57	0.48	0.67	<0.001
Radiation	1.22	0.58	2.56	0.608
Chemoradiation	1.08	0.70	1.65	0.736