Table 2.

Multivariate analysis of variables evaluated preoperatively or intra-operatively for central node recurrence-free survival for cN0M0 PTC patients

Variable	p value	Hazard ratio (95%CI)
Male gender	0.9405	1.04 (0.43–2.46)
Age ≥ 55 years	0.0064	2.23 (1.25–4.00)
Extrathyroid extension (Ex)	0.0002	3.23 (1.74–6.00)
Tumor size
>4.0 cm	<0.0001	5.68 (2.46–13.16)
2.1–4.0 cm	0.0002	3.70 (1.82–7.14)