Table 3 Univariate analysis–Cox proportional hazards regression for regional recurrence

Selective Neck Dissection

(Ref: Comprehensive)

0.94 (0.39,2.27)

0.89

Age ≥ 45 (Ref: <45)

0.93 (0.39,2.26)

0.88

Concurrent Thyroidectomy (Ref:No)

0.66 (0.21,2.06)

0.48

Extracapsular Extension

1.89 (0.75,4.74)

0.17

Level V Disease (Ref:No)

1.91 (0.64,5.72)

0.25

Total Nodes (CT)

1.26 (1.02,1.55)

0.029

Largest Node (CT)

1.24 (0.81,1.89)

0.32

Total Nodes (Path)

1.04 (0.97,1.11)

0.29

Largest Node (Path)

1.56 (1.19,2.05)

0.0015

Nodal Ratio (Path)

5.11 (0.38,68.66)

0.22

RAI (Ref: No)

3296373.77 (0,Inf)

1

RAI Dose

1 (0.99,1.01)

0.66

Multiple RAI (Ref: No)

0 (0,Inf)

1

EBRT (Ref: No)

3.45 (1.14,10.37)

0.028

Male (Ref: Female)

0.93 (0.38,2.27)

0.87

Age

1 (0.97,1.03)

0.91

Follow-Up (months)

1 (0.98,1.01)

0.61