Table 1.

Univariate and Cox model analyses of risk factors for the locoregional control survival in patients with cT1-2N0 tongue squamous cell carcinoma.

Variables	Univariate	Cox model
	Log-rank test	p	HR [95% CI]
Age (<40 vs. ≥40)	0.458
Gender	0.336
Smoking	0.478
Drinking	0.221
SUV max (≤ 9.0 vs. >9.0)	0.043	0.034	2.445 [1.226–4.998]
Pathologic tumor stage	0.012	<0.001	3.668 [1.479–9.336]
Pathologic neck lymph node stage	0.024	0.421	4.612 [0.741–9.667]
Perineural invasion	0.089
Extracapsular extension	0.642
Lymphovascular invasion	0.031	0.042	2.889 [1.365–4.416]
Tumor differentiation	0.009
Well
Moderate		0.097	2.579 [0.947–5.667]
Poor		0.016	3.978 [1.741–8.665]
Radiotherapy	0.116