Table 2 –

Multivariable survival analysis for entire cohort (Cohort A, N = 64,815)

Variable		H.R.	95% CI			P-value
Facility Volume	1.8–3.3 pts/year	0.97	0.91	-	1.04	0.36
	3.4–5.6 pts/year	0.95	0.89	-	1.01	0.08
	>5.6 pts/year	0.82	0.77	-	0.88	<.0001
	< 1.8 pts/year	ref
Diagnosis Year	Per 5-year increase	0.99	0.98	-	0.99	<.0001
Age	Per 10 year increase	1.38	1.36	-	1.41	<.0001
Race	African American	1.03	0.99	-	1.07	0.10
	Other/Unknown	0.83	0.77	-	0.89	<.0001
	White	ref
Hispanic	Yes	0.82	0.77	-	0.87	<.0001
	Unknown	1.02	0.95	-	1.09	0.6078
	No	ref
Charlson Score	1	1.29	1.25	-	1.34	<.0001
	2	1.82	1.73	-	1.91	<.0001
	0	ref
Location	Large metropolitan	1.00	0.95	-	1.06	0.89
	Small metropolitan	1.03	0.98	-	1.09	0.28
	Suburban	1.00	0.94	-	1.06	0.88
	Rural	ref
Income Quartile	$38,000 - $47,999	0.97	0.93	-	1.01	0.11
	$48,000 – $62,999	0.91	0.87	-	0.96	<.0001
	$63,000 +	0.84	0.79	-	0.89	<.0001
	Less than $38,000	ref
T	T4	1.58	1.51	-	1.65	<.0001
	X	1.39	1.34	-	1.45	<.0001
	Non-T4	ref
N	1	1.10	1.06	-	1.14	<.0001
	X	1.19	1.15	-	1.24	<.0001
	0	ref
Metastasis	1	3.85	3.61	-	4.10	<.0001
	1A	2.84	2.60	-	3.09	<.0001
	1B	3.96	3.73	-	4.21	<.0001
	1C	4.75	4.42	-	5.10	<.0001
	0	ref
Insurance	Status Unknown	0.56	0.29	-	1.08	0.08
	Medicaid	1.38	1.30	-	1.48	<.0001
	Medicare	1.09	1.05	-	1.13	<.0001
	Not Insured	1.34	1.26	-	1.43	<.0001
	Other Government	1.10	0.98	-	1.23	0.09
	Private Insurance / Managed Care	ref
% Without High School Degree	21% or more	1.03	0.97	-	1.09	0.29
	13% to 20.9%	1.03	0.98	-	1.08	0.22
	7% to 12.9%	1.02	0.98	-	1.06	0.26
	Less than 7%	ref