Table 3.
Univariable predictors of SPM.
| Hazard Ratio (95% CI) | p Value | |
|---|---|---|
| Age at the time of DTC diagnosis | 1.049 (1.021–1.078) | 0.001 |
| Age ≥ 55 years | 3.990 (1.792–8.880) | 0.001 |
| Female gender | 0.658 (0.275–1.575) | 0.35 |
| Papillary type | 1.183 (0.537–2.607) | 0.68 |
| >T2 | 1.954 (0.733–5.206) | 0.18 |
| N1 | 0.036 (0.001–2.733) | 0.13 |
| Thyroglobulin level at first RAI | 1.000 (0.997–1.002) | 0.73 |
| 131I cumulative activity dose | 1.001 (0.998–1.003) | 0.58 |
| <1850 MBq | 0.352 (0.048–2.600) | 0.31 |
| 1850–3700 MBq | 0.617 (0.280–1.359) | 0.23 |
| >3700 MBq | 0.895 (0.863–4.159) | 0.11 |
| Follow-up duration | 1.007 (1.002–1.011) | 0.001 |