Table 2.
Univariate and multivariate analyses of overall survival in the training set
| Variable | Univariate Analysis | Multivariate analysis | |
|---|---|---|---|
| P-Value | HR (95%CI) | P-Value | |
| Age | <0.001 | ||
| <45 | Reference | ||
| ≥45 | 2.706 (2.339–3.131) | <0.001 | |
| Sex | <0.001 | ||
| Female | Reference | ||
| Male | 1.919 (1.681–2.192) | <0.001 | |
| Race | 0.005 | ||
| White | Reference | ||
| Black | 1.471 (1.185–1.825) | 0.014 | |
| Other | 0.849 (0.687–1.048) | 0.127 | |
| Marital status | <0.001 | ||
| Married | Reference | ||
| Unmarried | 1.939 (1.709–2.199) | <0.001 | |
| Tumor Size | <0.001 | ||
| ≤1.0 cm | Reference | ||
| 1.1–2.0 cm | 0.954 (0.799–1.139) | 0.603 | |
| 2.1–4.0 cm | 1.445 (1.080–1.934) | 0.013 | |
| >4.0 cm | 2.787 (2.087–3.721) | <0.001 | |
| Extrathyroidal extension | <0.001 | ||
| Absent | Reference | ||
| Present | 2.297 (1.665–3.170) | <0.001 | |
| Multifocality | 0.685 | ||
| Unifocal | |||
| Multifocal | |||
| Surgery | 0.521 | ||
| Lobectomy | |||
| Total thyroidectomy | |||
| Radioactive iodine | <0.001 | ||
| Yes | Reference | ||
| No | 1.901 (1.669–2.167) | <0.001 | |
| T stage | <0.001 | ||
| T1 | Reference | ||
| T2 | 0.706 (0.504–0.988) | 0.042 | |
| T3 | 0.563 (0.390–0.814) | 0.002 | |
| T4 | 1.418 (0.910–2.207) | 0.123 | |
| N stage | <0.001 | ||
| N0 | Reference | ||
| N1 | 1.104 (0.945–1.289) | 0.214 | |
| M stage | <0.001 | ||
| M0 | Reference | ||
| M1 | 6.374 (5.054–8.038) | <0.001 | |