Table 1

Differences of topoisomerase IIα expression between the groups of superficial and truly invasive tumours

	Topoisomerase IIα index
	<10%	≥10%	Total
df, degrees of freedom; TCC, transitional cell carcinoma.
Non-invasive TCCs
Count	46	5	51
% Within stage	90.2	9.8	100.0
Muscle invasive TCCs
Count	29	14	43
% Within stage	67.4	32.6	100.0
Total
Count	75	19	94
% Within stage	79.8	20.2	100.0
χ² Tests	Value	df	Asymp. significance (2 sided)
Continuity correction	6.145	1	0.013