Differentiated Thyroid Cancer with Extrathyroidal Extension: Prognosis and the Role of External Beam Radiotherapy

Table 2

Univariate analysis and Log-rank $P$ value: summary.

Variable	CSS	LRFR
Histology ($N=321$)	$<$0.0001	0.15
Gender ($N=323$)	0.51	0.39
Age ($N=322$)	$<$0.0001	$<$0.0001
Differentiation ($N=187$)	$<$0.0001	0.034
Tumor size ($N=279$)	0.002	0.0004
Postoperative status ($N=309$)	$<$0.0001	$<$0.0001
Neck metastasis ($N=297$)	0.74	0.06
Multifocal ($N=306$)	0.009	0.96
Margin status ($N=287$)	0.005	0.65
LVI ($N=217$)	0.0006	0.09
T category (worst of pathology/OR) ($N=322$)	0.014	0.24
RAI ($N=323$)	0.62	0.13
RT ($N=323$)	0.01	0.71
SURGERY ($N=290$)	0.01	0.074