Table 2.

Correlation and concordance analyses between the cytological grading systems and the histological grading.

	Fisher's system	Robinson's system	Dabbs' system	Khan's system	Taniguchi's system	Mouriquand's system	Howell's system
Correlation (Spearman ρ)	0.654	0.738	0.604	0.696	0.615	0.613	0.614
Concordance	55/72	56/72	52/72	52/72	48/72	49/72	50/72
	76.3%	77.7%	72.2%	72.2%	66.6%	68%	69.4%
Agreement (kappa κ )	0.526	0.61	0.459	0.515	0.401	0.418	0.436
	(moderate)	(substantial)	(moderate)	(moderate)	(fair)	(moderate)	(moderate)