Table 2

Differences in topoisomerase IIα immunopositivity three groups of patients with different tumour grades

	Topoisomerase IIα expression
	<10%	≥10%	Total
df, degrees of freedom.
Grade I
Count	17		17
% Within grade	100.0		100.0
Grade II
Count	25	5	30
% Within grade	83.3	16.7	100.0
Grade III
Count	33	14	47
%Within grade	70.2%	29.8	100.0
Total
Count	75	19	94
% Within grade	79.8	20.2	100.0
χ² Tests	Value	df	Asymp. significance (2 sided)
Pearson χ²	7.212	2	0.027