Table 1. 2×2 comparison of KRAS mutations frequency in frozen and FFPE tissue sections (n = 159).

KRAS mutation (κ = 0.91, P = 0.96)
Frozen tissues					FFPE tissues
AMDS	DS				AMDS	DS
	MT	WT	TOTAL			MT	WT	TOTAL
MT	31	1	32		MT	21	3	24
WT	0	57	57		WT	0	45	45
TOTAL	31	58	89		TOTAL	21	48	69*

MT = Mutant-type.

WT = Wild type.

κ = κ coefficient.

P = statistical power.

^* = 1 KRAS analysis in the FFPE tissues were failed in DS due to noisy sequencing data.