Table 2. Stage Tis, Ta Risk-Matched Tumor Bank Cohort – 80 Patients.

Characteristic	Progression (n = 16) N (%)	No Progression (n = 64) N (%)	P-Value
Median Age (IQR)	74 (60-78)	69 (62-78)	0.66
Male	16 (100)	63 (98)	1.00
High Grade*	9 (56)	37 (58)	0.91
CIS+	9 (56)	27 (42)	0.31
Multifocal	10 (63)	19 (30)	0.01
> 3 cm	3 (19)	10 (16)	0.76
EORTC High-Risk Group**	9 (56)	37 (58)	0.91
Prior Local Treatment	1 (6)	5 (8)	1.00
Median Follow-up in Years (IQR)	6.6 (4.6-10.7)	5.5 (3.5-8.4)	0.32

^*2004 World Health Organization grade definitions

^**European Organisation for Research and Treatment of Cancer