Table 3.

Cohen’s kappa coefficients between the diagnostic tests

Tests chosen to compute the κ coefficient		κ value	p value for H 0: κ = 0
Test 1	Test 2
Histopathology by P1	Histopathology by P2	−0.0462	0.5448
Histopathology by P1	IHC	0.0594	0.4002
Histopathology by P1	PCR	−0.0425	0.5907
Histopathology by P2	IHC	0.2775	0.0005*
Histopathology by P2	PCR	0.2916	0.0003*
IHC	PCR	0.3176	<0.0001*

P1 and P2 denote two blinded microscopists

* p value < 0.01