Table 2.

Cox regression analysis on factors associated with survival outcomes

	Effect size	95% CI		P value
Recurrence-free survival
Loop used (monopolar as reference)	0.6	0.345	1.044	0.07
Tumor size	1.012	0.994	1.03	0.18
Multifocality	3.347	1.872	5.984	< 0.001
Post-operative MMC	1.697	0.793	3.631	0.17
Tumour grade (G1 as reference)	0.977	0.629	1.52	0.92
Tumour stage (Ta as reference)	1.045	0.516	2.116	0.90
Presence of muscle in tumour base sampling	1.345	0.68	2.661	0.40
Progression-free survival
Loop used (monopolar as reference)	0.783	0.449	1.368	0.73
Tumor size	1.002	0.984	1.021	0.49
Multifocality	2.205	1.235	3.935	0.07
Post-operative MMC	1.093	0.521	2.297	0.51
Tumour grade (G1 as reference)	1.157	0.731	1.83	0.16
Tumour stage (Ta as reference)	1.152	0.573	2.317	0.39
Presence of muscle in tumour base sampling	1.28	0.628	2.609	0.99

MMC = intravesical MMC treatment