Table III.

Association of EBV infection and clinical parameters including age, tumor size, tumor grade, and involvement of lymph nodes

Age group	EBV infection positive	EBV infection negative	Total
>50	9	32	41
< 50	15	36	51
Total	24	68	92
Size of the tumor	EBV infection positive	EBV infection negative	Total
< 1	0	5	5
> 1- < 3	10	26	36
> 3	14	37	51
Total	24	68	92
Grade	EBV infection positive	EBV infection negative	Total
I	2	8	10
II	9	24	33
III	13	36	49
Total	24	68	92