Table 3.

Multivariate model of ALL patient characteristics and overall survival. Note, a lower hazard ratio implies a decreased risk of death. After adjusting for covariates, a distance of >50 miles to treatment center is associated with the lowest overall survival.

Characteristic	HR (95% CI)	P
Sphere Distance to Center
≤10 Miles v. >50 Miles	0.91 (0.84–0.995)	0.04
10–20 Miles v. >50 Miles	0.86 (0.78–0.95)	0.0043
20–50 Miles v. >50 Miles	0.87 (0.79–0.96)	0.0048
Charlson-Deyo Score
0 v. 3	0.41 (0.28–0.61)	<.0001
1 v. 3	0.60 (0.40–0.90)	0.01
2 v. 3	0.68 (0.41–1.13)	0.13
Age
≥18 v. <18	5.59 (5.24–5.99)	<.0001
Race
African American v. Caucasian	1.30 (1.16–1.45)	<.0001
Asian v. Caucasian	0.95 (0.80–1.13)	0.53
Hispanic/Latinos v. Caucasian	1.19 (1.10–1.28)	<.0001
Native American v. Caucasian	1.54 (1.10–2.14)	0.01
Others v. Caucasian	0.93 (0.67–1.29)	0.68
Insurance
Government v. Private	1.26 (1.17–1.35)	<.0001
Not Insured v. Private	1.27 (1.13–1.43)	<.0001
Community Median Income
< $38,000 v. ≥ $63,000	1.27 (1.15–1.40)	<.0001
$38,000– $63,000 v. ≥ $63,000	1.16 (1.07–1.26)	0.0003