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. 2020 May 22;31(5):e66. doi: 10.3802/jgo.2020.31.e66

Table 3. Univariable and multivariable Cox regression.

Characteristics Univariable Multivariable
HR (95% CI) p-value HR (95% CI) p-value
Age 1.03 (1.03–1.04) <0.001 1.03 (1.02–1.04) <0.001
Stage
Localized 1 1
Regional 2.51 (2.16–2.94) <0.001 2.48 (2.09–2.93) <0.001
Distant 8.80 (7.09–10.9) <0.001 5.40 (4.18–6.97) <0.001
Tumor size (cm)
<2 1
2–3.9 1.77 (1.48–2.24) <0.001 1.49 (1.23–1.80) <0.001
≥4 2.49 (2.05–3.02) <0.001 1.75 (1.43–2.13) <0.001
Size unknown 1.07 (0.89–1.28) 0.498 1.03 (0.86–1.24) 0.768
Race
White 1 1
Black 1.40 (0.99–1.98) 0.054 1.27 (0.89–1.81) 0.196
Other 1.02 (0.67–1.56) 0.921 1.01 (0.66–1.56) 0.952
CDCC score
0 1
1 1.39 (1.17–1.66) <0.001 1.21 (1.01–1.44) 0.037
2 2.47 (1.84–3.32) <0.001 1.62 (1.20–2.19) 0.002
≥3 4.02 (2.36–6.83) <0.001 2.65 (1.53–4.58) <0.001
Insurance
Not insured 1 1
Private insurance 0.53 (0.34–0.82) 0.004 0.61 (0.39–0.96) 0.033
Medicaid 0.94 (0.54–1.63) 0.833 0.90 (0.51–1.58) 0.705
Medicare 1.14 (0.74–1.74) 0.555 0.62 (0.39–0.99) 0.045
Other government 0.60 (0.18–2.01) 0.408 0.62 (0.18–2.10) 0.441
Unknown 0.91 (0.49–1.70) 0.760 0.79 (0.41–1.52) 0.483
Median income quartiles
<$38,000 1 1
$38,000–$47,999 0.83 (0.67–1.02) 0.074 0.97 (0.78–1.21) 0.802
$48,000–$62,999 0.72 (0.58–0.88) 0.002 0.87 (0.70–1.09) 0.220
$63,000+ 0.71 (0.58–0.87) 0.001 0.86 (0.70–1.07) 0.187
% of adults in patient zip code with no high school degree
≥21.0 1 - -
13.0–20.9 1.01 (0.91–1.26) 0.928 - -
7.0–12.9 0.85 (0.69–1.05) 0.141 - -
<7.0 0.86 (0.68–1.07) 0.171 - -
Region
Northeast 1 1
Midwest 1.19 (0.97–1.45) 0.098 1.26 (1.02–1.56) 0.033
South 1.17 (0.97–1.43) 0.109 1.19 (0.96–1.46) 0.115
West 0.87 (0.70–1.08) 0.201 1.23 (0.98–1.56) 0.079
Facility type
Academic 1 1
Non-academic 1.21 (1.06–1.39) 0.005 1.23 (1.07–1.42) 0.004
County population
Metro 1 - -
Urban 1.11 (0.93–1.33) 0.242 - -
Rural 1.08 (0.68–1.73) 0.743 - -
Primary site surgery
No 1 1
Yes 0.21 (0.16–0.27) <0.001 0.48 (0.36–0.65) <0.001
Lymph node surgery
No 1 1
Yes 0.76 (0.66–0.87) <0.001 0.83 (0.72–0.97) 0.020
Unknown 0.84 (0.27–2.60) 0.756 1.15 (0.36–3.63) 0.082
Radiation
No 1 1
Yes 2.14 (1.78–2.58) <0.001 1.25 (1.01–1.54) 0.036
Chemotherapy
No 1 1
Yes 1.62 (1.23–2.13) <0.001 0.81 (0.60–1.09) 0.166
Immunotherapy
No 1 - -
Yes 1.11 (0.89–1.38) 0.364 - -

The p-values less than or equal to 0.05 are shown in bold.

CDCC, Charlson/Deyo comorbidity; CI, confidence interval; HR, hazard ratio.