Table 2. Tumor thickness with different parameters (number of patients, T-stage with positive neck nodes).

Tumor thickness	Percentage of patients (%)	T1 stage (%)	T2 stage (%)	Node positive T1 lesion (%) N = 25 patients	Node positive T2 lesion (%) N= 53 patients
< 5 mm	62.80	92.00	49.10	0	0
> 5 mm	37.20	8.00	50.90	0	37.73*

Note: * p -value < 0.0001