Table 3 Factors considered for prediction of survival

Sex

0.523

Age

0.132

Histology

0.004

Multifocality

0.887

Bilaterality

0.292

Type of surgery

0.603

Size of tumor

0.392

Lymph node metastases at operation

0.263

Thyroid parenchyma invasion

0.502

Thyroid capsule invasion

0.095

Extrathyroidal invasion

0.863

Vessel invasion

0.058

Metastatic disease from diagnosis

0.180

First site of metastasis

0.874

Uptake at ablation

0.568

TSH on T4 withdrawal

0.782

Thyroglobulin on T4 withdrawal

0.799

Total 131 I mCi

0.426

Years to metastasis

0.115