Table 3.
Univariate and multivariable Cox regression analyses for independent prognostic factors affecting cause-specific survival in the entire cohort (n = 277).
| Variables | Unadjusted | Adjusted | ||||
|---|---|---|---|---|---|---|
| HR | 95%CI | P | HR | 95%CI | P | |
| Age (years) | ||||||
| <25 | 1 | 1 | ||||
| ≥25 | 2.305 | 1.558–3.411 | <0.001 | 2.210 | 1.490–3.279 | <0.001 |
| Gender | ||||||
| Male | 1 | — | ||||
| Female | 1.013 | 0.687–1.493 | 0.948 | — | — | — |
| Race/ethnicity | ||||||
| White | 1 | 1 | ||||
| Black | 2.184 | 1.058–4.506 | 0.035 | 1.595 | 0.734–3.467 | 0.238 |
| Other | 1.199 | 0.656–2.192 | 0.554 | 0.862 | 0.458–1.622 | 0.645 |
| Tumor location | ||||||
| Axial | 1 | — | ||||
| Extremity | 0.989 | 0.679–1.440 | 0.952 | — | — | — |
| Tumor size | ||||||
| ≤5 cm | 1 | 1 | ||||
| >5–10 cm | 0.386 | 0.177–0.844 | 0.017 | 0.420 | 0.186–0.944 | 0.036 |
| >10 cm | 0.555 | 0.259–1.192 | 0.131 | 0.586 | 0.263–1.306 | 0.191 |
| Unknown | 0.743 | 0.342–1.612 | 0.452 | 0.568 | 0.250–1.290 | 0.176 |
| Regional nodal status | ||||||
| Negative | 1 | — | ||||
| Positive | 1.105 | 0.678–1.802 | 0.688 | — | — | — |
| Unknown | 0.920 | 0.441–1.919 | 0.824 | — | — | — |
| The sites of distant metastases | ||||||
| Bone yes vs. no | 2.183 | 1.482–3.216 | <0.001 | 1.903 | 1.254–2.887 | 0.002 |
| Lung yes vs. no | 0.833 | 0.567–1.223 | 0.351 | |||
| Liver yes vs. no | 2.531 | 1.102–5.814 | 0.029 | 1.436 | 0.582–3.541 | 0.433 |
| Brain yes vs. no | 0.906 | 0.288–2.855 | 0.866 | |||
| Distant lymph node yes vs. no | 1.142 | 0.596–2.189 | 0.69 | |||
| The number of distant metastases | ||||||
| 1 | 1 | 1 | ||||
| ≥2 | 2.063 | 1.376–3.095 | <0.001 | 1.458 | 0.943–2.255 | 0.090 |
CI, confidence interval; HR, hazard ratio.