Table 2. Univariate and multivariate survival analyses of overall survival in patients who underwent surgery.
| Subject characteristics | Univariable | Multivariable | |||
|---|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | ||
| Age, years | |||||
| ≤18 | Reference | Reference | |||
| 19–40 | 1.822 (1.539–2.157) | <0.001 | 1.781 (1.500–2.116) | <0.001 | |
| 41–64 | 3.505 (3.005–4.088) | <0.001 | 2.877 (2.453–3.374) | <0.001 | |
| ≥65 | 4.826 (4.139–5.627) | <0.001 | 3.835 (3.269–4.499) | <0.001 | |
| Sex | |||||
| Male | Reference | Reference | |||
| Female | 0.935 (0.901–0.970) | <0.001 | 0.876 (0.843–0.909) | <0.001 | |
| Race | |||||
| White | Reference | Reference | |||
| Black | 1.133 (1.072–1.197) | <0.001 | 1.214 (1.148–1.284) | <0.001 | |
| Others* | 0.903 (0.845–0.966) | 0.003 | 0.910 (0.851–0.973) | 0.006 | |
| Unknown | NA | NA | |||
| Grade | |||||
| I | Reference | Reference | |||
| II | 1.364 (1.221–1.524) | <0.001 | 1.331 (1.190–1.488) | <0.001 | |
| III | 1.788 (1.603–1.994) | <0.001 | 2.004 (1.796–2.237) | <0.001 | |
| IV | 2.255 (2.017–2.521) | <0.001 | 2.962 (2.646–3.315) | <0.001 | |
| Unknown | NA | NA | |||
| T stage | |||||
| T1 | Reference | Reference | |||
| T2 | 1.256 (1.167–1.353) | <0.001 | 1.195 (1.109–1.288) | <0.001 | |
| T3 | 1.256 (1.176–1.343) | <0.001 | 1.104 (1.031–1.182) | 0.005 | |
| T4 | 1.818 (1.697–1.947) | <0.001 | 1.462 (1.361–1.570) | <0.001 | |
| Unknown | NA | NA | |||
| N stage | |||||
| N0 | Reference | Reference | |||
| N1 | 1.066 (1.019–1.115) | 0.006 | 1.087 (1.037–1.139) | <0.001 | |
| N2 | 1.356 (1.288–1.428) | <0.001 | 1.333 (1.261–1.409) | <0.001 | |
| N3 | 0.994 (0.903–1.095) | 0.904 | 1.139 (1.032–1.257) | 0.01 | |
| Unknown | NA | NA | |||
| Bone MET | |||||
| None | Reference | Reference | |||
| Yes | 1.494 (1.425–1.566) | <0.001 | 1.305 (1.242–1.371) | <0.001 | |
| Unknown | NA | NA | |||
| Brain MET | |||||
| None | Reference | Reference | |||
| Yes | 1.729 (1.602–1.867) | <0.001 | 1.826 (1.684–1.980) | <0.001 | |
| Unknown | NA | NA | |||
| Liver MET | |||||
| None | Reference | Reference | |||
| Yes | 1.679 (1.613–1.748) | <0.001 | 1.716 (1.643–1.792) | <0.001 | |
| Unknown | NA | NA | |||
| Radiotherapy | |||||
| No | Reference | Reference | |||
| Yes | 0.865 (0.827–0.905) | <0.001 | 0.853 (0.813–0.895) | <0.001 | |
| Unknown | NA | NA | |||
| Chemotherapy | |||||
| No | Reference | Reference | |||
| Yes | 0.587 (0.566–0.610) | <0.001 | 0.592 (0.569–0.616) | <0.001 | |
*, American Indian/Alaska Native, Asian or Pacific Islander. OR, odds ratio; CI, confidence interval; NA, not available; MET, metastases.