Table 3.

COX proportional hazard analysis of the predictors of DFS in the PTC series

Variable	P	HR	95% CI
			Lower	Upper
Gender	0.356	0.607	0.21	1.752
Patients’ age	0.791	0.884	0.354	2.204
Tumor size	0.033	1.892	1.051	3.404
LN stage	0.002	4.975	1.845	13.411
Multifocality	0.644	1.313	0.414	4.159
Extrathyroid extension	0.075	2.72	0.904	8.18

PTC, papillary thyroid carcinoma; DFS, disease-free survival.