Table 3.
Univariate and multivariate analyses of cancer-specific survival in the training set
| Variable | Univariate analysis | Multivariate analysis | |
|---|---|---|---|
| P-value | HR (95%CI) | P-value | |
| Age | <0.001 | ||
| <45 | Reference | ||
| ≥45 | 3.702 (2.667–5.139) | <0.001 | |
| Sex | <0.001 | ||
| Female | Reference | ||
| Male | 1.542 (1.2058–1.972) | <0.001 | |
| Race | 0.018 | ||
| White | Reference | ||
| Black | 1.291 (0.790–2.109) | 0.309 | |
| Other | 1.213 (0.881–1.668) | 0.236 | |
| Marital status | 0.008 | ||
| Married | Reference | ||
| Unmarried | 1.423 (1.116–1.816) | 0.004 | |
| Tumor Size | <0.001 | ||
| ≤1.0 cm | Reference | ||
| 1.1–2.0 cm | 1.272 (0.773–2.094) | 0.343 | |
| 2.1–4.0 cm | 2.240 (1.295–3.874) | 0.004 | |
| >4.0 cm | 4.351 (2.521–7.507) | <0.001 | |
| Extrathyroidal extension | <0.001 | ||
| Absent | Reference | ||
| Present | 2.017 (1.209–3.365) | 0.007 | |
| Multifocality | 0.506 | ||
| Unifocal | |||
| Multifocal | |||
| Surgery | 0.191 | ||
| Lobectomy | |||
| Total thyroidectomy | |||
| Radioactive iodine | 0.925 | ||
| Yes | |||
| No | |||
| T stage | <0.001 | ||
| T1 | Reference | ||
| T2 | 1.143 (0.582–2.246) | 0.698 | |
| T3 | 1.808 (0.935–3.497) | 0.079 | |
| T4 | 7.009 (3.312–14.834) | <0.001 | |
| N stage | <0.001 | ||
| N0 | Reference | ||
| N1 | 1.643 (1.253–2.153) | <0.001 | |
| M stage | <0.001 | ||
| M0 | Reference | ||
| M1 | 8.462 (6.334–11.307) | <0.001 | |