Variable	Odds Ratio	95% CI	P-value
Age >65 years old	1.14	0.95 – 1.39	0.17
Male	0.96	0.81 – 1.14	0.66
Race
White	Reference
Black	1.69	1.34 – 2.14	<0.001
Hispanic	0.68	0.52 – 0.89	0.005
Asian	2.23	1.75 – 2.84	<0.001
Native American	1.00	0.44 – 2.28	0.996
Charlson/Deyo Comorbidity Score
CDCC 0	Reference
CDCC 1	1.27	1.06 – 1.52	0.009
CDCC ≥2	1.06	0.87 – 1.28	0.57
Fibrosis score
F0 (none to moderate fibrosis)	Reference
F1 (severe fibrosis or cirrhosis)	0.20	0.17 – 0.24	<0.001
Tumor size
Tumor <3 cm	Reference
Tumor 3–5 cm	2.33	1.98 – 2.75	<0.001
Tumor >5 cm	13.7	10.5 – 17.9	<0.001
Insurance status
Private	Reference
Medicare	0.77	0.63 – 0.93	0.008
Medicaid	0.82	0.64 – 1.06	0.13
Other government	0.41	0.22 – 0.76	0.005
None	1.07	0.66 – 1.76	0.78
Median income quartiles (by zip code)
> $63,000	Reference
$48,000–$62,999	1.13	0.93 – 1.38	0.22
$38,000–$47,999	1.12	0.90 – 1.40	0.30
< $38,000	0.99	0.78 – 1.26	0.95
Facility type
Community cancer program	Reference
Comprehensive community cancer program	1.01	0.50 – 2.05	0.97
Academic/research program	0.69	0.35 – 1.37	0.29
Integrated network cancer program	0.48	0.23 – 1.00	0.050
Facility region
New England/Mid Atlantic	Reference
South Atlantic	1.02	0.77 – 1.35	0.89
North Central	0.94	0.74 – 1.19	0.62
South Central	0.88	0.67 – 1.16	0.37
Mountain	0.57	0.38 – 0.85	0.006
Pacific	0.38	0.31 – 0.48	<0.001
Year of diagnosis
2004 – 2009	Reference
2010 – 2014	1.19	1.01 – 1.41	0.04

CI: confidence interval; CDCC: Charlson/Deyo Comorbidity Score