Table 2.
Logistic regression of factors influencing systemic therapy, surgery, and radiation.
| Systemic therapy | Surgery | Radiation | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Odds ratio | P value | 95% confidence interval | Odds ratio | P value | 95% confidence interval | Odds ratio | P value | 95% confidence interval | |
| Age at index | 0.970 | <0.0001 | [0.961, 0.980] | 0.986 | 0.013 | [0.976, 0.997] | 0.984 | 0.001 | [0.974, 0.994] |
| Female | 0.787 | 0.008 | [0.658, 0.939] | 0.887 | 0.216 | [0.734, 1.073] | 0.727 | 0.001 | [0.607, 0.870] |
| Type of insurance plan | |||||||||
| Comprehensive | 1.168 | 0.529 | [0.720, 1.897] | 1.160 | 0.563 | [0.701, 1.918] | 1.721 | 0.031 | [1.050, 2.281] |
| HMO | 1.105 | 0.688 | [0.679, 1.799] | 0.676 | 0.134 | [0.404, 1.129] | 1.190 | 0.500 | [0.718, 1.973] |
| POS | 0.805 | 0.423 | [0.474, 1.368] | 0.981 | 0.946 | [0.558, 1.725] | 1.543 | 0.120 | [0.894, 2.663] |
| PPO | 1.041 | 0.858 | [0.673, 1.610] | 1.053 | 0.827 | [0.665, 1.667] | 1.489 | 0.084 | [0.948, 2.338] |
| Medicare beneficiary | 0.755 | 0.071 | [0.557, 1.025] | 0.902 | 0.537 | [0.651, 1.250] | 0.850 | 0.301 | [0.624, 1.157] |
| Region | |||||||||
| Northeast | 0.898 | 0.528 | [0.643, 1.254] | 1.541 | 0.020 | [1.069, 2.222] | 1.044 | 0.806 | [0.742, 1.469] |
| North central | 1.026 | 0.843 | [0.793, 1.328] | 1.040 | 0.783 | [0.786, 1.377] | 1.019 | 0.889 | [0.782, 1.328] |
| South | 0.857 | 0.214 | [0.672, 1.093] | 1.044 | 0.748 | [0.803, 1.356] | 1.070 | 0.594 | [0.835, 1.371] |
| Metastasis site at index | |||||||||
| Lung | 1.292 | 0.039 | [1.013, 1.647] | 0.418 | <0.0001 | [0.319, 0.548] | 0.920 | 0.498 | [0.723, 1.171] |
| Brain | 1.598 | 0.000 | [1.239, 2.062] | 0.498 | <0.0001 | [0.377, 0.658] | 6.388 | <0.0001 | [4.851, 8.412] |
| Distant part of skin | 1.054 | 0.730 | [0.782, 1.420] | 0.867 | 0.451 | [0.598, 1.257] | 0.929 | 0.628 | [0.691, 1.250] |
| Bone | 0.830 | 0.245 | [0.606, 1.136] | 0.302 | <0.0001 | [0.219, 0.417] | 2.628 | <0.0001 | [1.966, 3.512] |
| Liver | 1.426 | 0.026 | [1.044, 1.946] | 0.280 | <0.0001 | [0.201, 0.391] | 0.624 | 0.005 | [0.451, 0.865] |
| Charlson comorbidity index (removed cancer) | 0.985 | 0.683 | [0.918, 1.058] | 1.155 | 0.000 | [1.068, 1.250] | 1.065 | 0.084 | [0.992, 1.143] |
| Specialty of treating physician within 90 days after index | |||||||||
| Oncologist | 1.534 | <0.0001 | [1.288, 1.828] | 1.051 | 0.606 | [0.870, 1.269] | 1.581 | <0.0001 | [1.324, 1.887] |
| Dermatologist | 0.902 | 0.406 | [0.708, 1.150] | 1.586 | 0.002 | [1.181, 2.129] | 0.808 | 0.089 | [0.632, 1.033] |
| Length of follow-up | 1.001 | <0.0001 | [1.001, 1.001] | 1.003 | <0.0001 | [1.002, 1.003] | 1.000 | 0.163 | [1.000, 1.000] |