Table 2.

Correlation between the results of the PCR and in situ hybridization techniques.

	PCR
In situ Hybridization	EBV (+)	EBV (-)	Total
EBV (+)	5	4	9
EBV (-)	49	62	111
Total	54	66	120

Cohen’s kappa index: 0.034 (SE: 0.052); Sensibility: 55.5% Specificity: 55.8%