Table 4.
Univariate and multivariate logistic regression analysis of chemotherapy receipt in AJCC stage IV patients.
| Characteristics | Levels | Crude OR | 95% CI | p | Adjusted OR | 95% CI | p |
|---|---|---|---|---|---|---|---|
| Age | ≤ 65 years | Ref | Ref | ||||
| >65 years | 0.380 | 0.355–0.407 | <0.001 | 0.353 | 0.327–0.381 | <0.001 | |
| Sex | Male | Ref | Ref | ||||
| Female | 0.831 | 0.776–0.890 | <0.001 | 1.008 | 0.934–1.088 | 0.843 | |
| Race | NHW | Ref | Ref | ||||
| Hispanic | 0.941 | 0.866–1.024 | 0.157 | 0.922 | 0.837–1.015 | 0.097 | |
| NHAPI | 0.874 | 0.790–0.967 | 0.009 | 0.826 | 0.737–0.926 | 0.001 | |
| NHB | 0.769 | 0.694–0.851 | <0.001 | 0.869 | 0.776–0.972 | 0.014 | |
| Insurance | Insured | Ref | Ref | ||||
| Medicaid | 0.731 | 0.672–0.796 | <0.001 | 0.685 | 0.623–0.754 | <0.001 | |
| Uninsured | 0.639 | 0.557–0.734 | <0.001 | 0.439 | 0.378–0.509 | <0.001 | |
| Marriage | Married | Ref | Ref | ||||
| Divorced | 0.775 | 0.687–0.874 | <0.001 | 0.756 | 0.667–0.858 | <0.001 | |
| Single | 0.658 | 0.602–0.720 | <0.001 | 0.617 | 0.560–0.680 | <0.001 | |
| Widowed | 0.299 | 0.269–0.333 | <0.001 | 0.434 | 0.386–0.488 | <0.001 | |
| SEER stage | Distant | Ref | Ref | ||||
| Regional | 1.258 | 1.121–1.411 | <0.001 | 0.761 | 0.552–1.049 | 0.095 | |
| Tumor grade | I | Ref | |||||
| II | 0.913 | 0.692–1.206 | 0.523 | ||||
| III | 1.045 | 0.798–1.369 | 0.749 | ||||
| IV | 0.871 | 0.592–1.281 | 0.483 | ||||
| Unknown | 0.819 | 0.621–1.081 | 0.159 | ||||
| Metastasis | No | Ref | Ref | ||||
| Yes | 0.758 | 0.681–0.845 | <0.001 | 0.542 | 0.400–0.733 | <0.001 | |
| Income | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 1.057 | 0.965–1.158 | 0.233 | 1.064 | 0.927–1.221 | 0.379 | |
| Q3 | 1.324 | 1.204–1.457 | <0.001 | 1.056 | 0.889–1.256 | 0.534 | |
| Q4 (highest) | 1.355 | 1.232–1.490 | <0.001 | 0.918 | 0.731–1.152 | 0.460 | |
| Unemployment | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 0.940 | 0.855–1.032 | 0.195 | 1.047 | 0.936–1.170 | 0.422 | |
| Q3 | 0.807 | 0.735–0.886 | <0.001 | 0.999 | 0.874–1.142 | 0.990 | |
| Q4 (highest) | 0.767 | 0.699–0.841 | <0.001 | 0.972 | 0.845–1.118 | 0.691 | |
| Poverty rate | Q1 (lowest) | Ref | Ref | ||||
| Q2 | 0.841 | 0.764–0.925 | <0.001 | 0.834 | 0.744–0.935 | 0.002 | |
| Q3 | 0.703 | 0.640–0.773 | <0.001 | 0.731 | 0.609–0.879 | 0.001 | |
| Q4 (highest) | 0.698 | 0.635–0.768 | <0.001 | 0.776 | 0.639–0.944 | 0.011 | |
| Education level | Q1 (low) | Ref | Ref | ||||
| Q2 (moderate) | 1.125 | 1.038–1.220 | 0.004 | 1.079 | 0.955–1.219 | 0.220 | |
| Q3 (high) | 1.373 | 1.251–1.508 | <0.001 | 1.295 | 1.095–1.531 | 0.002 |
OR, odd ratio; CI, confidence interval; NHW, non-Hispanic White; NHB, non-Hispanic Black; NHAPI, non-Hispanic Asian or Pacific Islander.