Table 5.
Univariate and multivariate logistic regression analysis of no treatment (no chemotherapy or surgery) in AJCC stage IV patients.
| Characteristics | Levels | Crude OR | 95% CI | p | Adjusted OR | 95% CI | p |
|---|---|---|---|---|---|---|---|
| Age | ≤65 years | Ref | Ref | ||||
| >65 years | 2.232 | 2.080–2.395 | <0.001 | 2.556 | 2.356–2.774 | <0.001 | |
| Sex | Male | Ref | Ref | ||||
| Female | 1.106 | 1.029–1.188 | 0.006 | 0.934 | 0.861–1.012 | 0.096 | |
| Race | NHW | Ref | Ref | ||||
| Hispanic | 0.972 | 0.890–1.061 | 0.522 | 1.045 | 0.944–1.157 | 0.396 | |
| NHAPI | 0.927 | 0.833–1.031 | 0.163 | 1.054 | 0.933–1.190 | 0.397 | |
| NHB | 1.223 | 1.101–1.359 | <0.001 | 1.120 | 0.996–1.260 | 0.058 | |
| Insurance | Insured | Ref | Ref | ||||
| Medicaid | 1.239 | 1.135–1.354 | <0.001 | 1.353 | 1.224–1.495 | <0.001 | |
| Uninsured | 1.680 | 1.462–1.931 | <0.001 | 2.329 | 1.997–2.716 | <0.001 | |
| Marriage | Married | Ref | Ref | ||||
| Divorced | 1.338 | 1.180–1.516 | <0.001 | 1.363 | 1.194–1.557 | <0.001 | |
| Single | 1.606 | 1.465–1.762 | <0.001 | 1.712 | 1.546–1.895 | <0.001 | |
| Widowed | 2.779 | 2.504–3.084 | <0.001 | 2.140 | 1.900–2.409 | <0.001 | |
| SEER stage | Distant | Ref | Ref | ||||
| Regional | 0.134 | 0.109–0.164 | <0.001 | 0.451 | 0.292–0.698 | <0.001 | |
| Tumor grade | I | Ref | Ref | ||||
| II | 1.014 | 0.761–1.352 | 0.924 | 1.063 | 0.784–1.442 | 0.695 | |
| III | 0.833 | 0.630–1.102 | 0.200 | 1.026 | 0.763–1.381 | 0.863 | |
| IV | 0.742 | 0.491–1.123 | 0.158 | 0.949 | 0.611–1.473 | 0.815 | |
| Unknown | 1.476 | 1.109–1.964 | 0.008 | 1.607 | 1.187–2.177 | 0.002 | |
| Metastasis | No | Ref | Ref | ||||
| Yes | 6.605 | 5.505–7.925 | <0.001 | 3.787 | 2.576–5.567 | <0.001 | |
| Income | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 0.876 | 0.797–0.963 | 0.006 | 0.899 | 0.777–1.039 | 0.149 | |
| Q3 | 0.804 | 0.728–0.887 | <0.001 | 0.944 | 0.787–1.133 | 0.538 | |
| Q4 (highest) | 0.754 | 0.683–0.833 | <0.001 | 1.022 | 0.805–1.299 | 0.857 | |
| Unemployment | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 1.014 | 0.919–1.119 | 0.780 | 0.888 | 0.789–0.998 | 0.047 | |
| Q3 | 1.085 | 0.985–1.196 | 0.099 | 0.918 | 0.798–1.057 | 0.235 | |
| Q4 (highest) | 1.235 | 1.121–1.359 | <0.001 | 1.023 | 0.884–1.185 | 0.759 | |
| Poverty rate | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 1.127 | 1.020–1.245 | 0.019 | 1.140 | 1.011–1.285 | 0.032 | |
| Q3 | 1.219 | 1.105–1.345 | <0.001 | 1.258 | 1.037–1.526 | 0.020 | |
| Q4 (highest) | 1.308 | 1.184–1.444 | <0.001 | 1.155 | 0.941–1.419 | 0.168 | |
| Education level | Q1 (low) | Ref | Ref | ||||
| Q2 (moderate) | 0.885 | 0.814–0.962 | 0.004 | 0.961 | 0.846–1.092 | 0.543 | |
| Q3 (high) | 0.762 | 0.692–0.840 | <0.001 | 0.814 | 0.682–0.972 | 0.023 |
OR, odd ratio; CI, confidence interval; NHW, non-Hispanic White; NHB, non-Hispanic Black; NHAPI, non-Hispanic Asian or Pacific Islander.