Characteristic Univariable Multivariable
N HR1 95% CI1 p-value HR1 95% CI1 p-value
Surgery 8,680
MIS — — — —
Open 1.68 1.55, 1.81 <0.001 1.35 1.24, 1.47 <0.001
Race 8,680
Black — — — —
Other 0.69 0.57, 0.85 <0.001 0.90 0.71, 1.14 0.4
White 1.01 0.91, 1.12 0.9 1.01 0.90, 1.14 0.9
Insurance Status 8,594
Medicaid — — — —
Medicare 1.39 1.18, 1.64 <0.001 1.20 0.98, 1.46 0.073
Not Insured 0.94 0.71, 1.24 0.7 1.03 0.75, 1.43 0.8
Private Insurance/Managed Care/Goverment 0.71 0.60, 0.83 <0.001 0.74 0.60, 0.90 0.003
Region 8,218
Midwest — — — —
NorthEast 0.80 0.72, 0.88 <0.001 0.85 0.76, 0.95 0.005
South 1.02 0.93, 1.11 0.7 1.11 1.01, 1.23 0.034
West 0.87 0.77, 0.98 0.018 0.98 0.85, 1.12 0.8
Income 8,665
< $38,000 — — — —
>=$63,000 0.73 0.66, 0.80 <0.001 0.79 0.68, 0.92 0.003
$38,000-$47,999 0.86 0.77, 0.96 0.006 0.89 0.78, 1.02 0.085
$48,000-$62,999 0.83 0.75, 0.93 <0.001 0.88 0.77, 1.01 0.077
No High School Degree 8,668
<7.0% — — — —
>=21.0% 1.25 1.12, 1.40 <0.001 1.00 0.85, 1.18 >0.9
13.0-20.9% 1.24 1.13, 1.36 <0.001 1.02 0.89, 1.17 0.8
7.0-12.9% 1.08 0.99, 1.18 0.084 1.05 0.94, 1.17 0.4
Staging 7,949
Stage 0 — — — —
Stage I 1.69 1.19, 2.40 0.003 2.23 1.05, 4.70 0.036
Stage II 6.91 4.90, 9.74 <0.001 5.17 2.46, 10.9 <0.001
Stage III 10.5 7.08, 15.5 <0.001 7.36 3.39, 16.0 <0.001
Tumor Grade 7,421
Moderately differentiated, moderately well differentiated, intermediate differentiation — — — —
Poorly differentiated 1.69 1.56, 1.84 <0.001 1.50 1.37, 1.64 <0.001
Undifferentiated, anaplastic 1.32 1.03, 1.69 0.030 1.30 0.98, 1.72 0.069
Well differentiated, differentiated, NOS 0.21 0.19, 0.24 <0.001 0.30 0.27, 0.34 <0.001

1 HR = Hazard Ratio, CI = Confidence Interval