Table 1.
Multivariate analysis of the postoperative recurrence of PTC in elderly patients who were periodically examined after the operation
| Variable | Hazard ratio | 95% CI | P-value | |
|---|---|---|---|---|
| Size | Every 1-cm increase | 2.12 | 1.55-2.89 | <0.001 |
| Number | - | 0.756 | ||
| Gender | Female | Reference | ||
| Male | 0.859 | |||
| Multiplicity | Absence of multiplicity | Reference | ||
| Multiplicity | 0.638 | |||
| Extent of LNM | Absence of LNM | Reference | ||
| Central LNM | 9.08 | 2.01-40.95 | 0.004 | |
| Lateral LNM | 14.71 | 2.62-82.47 | 0.002 | |
| Central and lateral LNM | 58.41 | 6.45-528.94 | <0.001 | |
| Extent of ETE | Absence of ETE | Reference | ||
| Minimal ETE | 0.217 | |||
| Wide ETE | 0.929 | |||
| Type of surgery | Hemithyroidectomy | Reference | ||
| Total thyroidectomy with CND | 0.790 | |||
| Total thyroidectomy with CND and unilateral LND | 0.736 | |||
| Total thyroidectomy with CND and bilateral LND | 0.142 | |||
| Dose of RAIT | - | 0.538 |
PTC, papillary thyroid carcinoma; CI, confidence interval; LNM, lymph node metastasis; ETE, extrathyroidal extension; CND, central neck dissection; LND, lateral neck dissection; RAIT, radioactive iodine therapy.