Table 3. Chi square test in subgroup.

	PUCB		SUCB
	NR	R	NR	R	P value
Age
≤ 67	37	68	28	81	0.139
> 67	39	69	25	79	0.072
Gender
Male	61	109	45	128	0.061
Female	15	28	8	32	0.148
Grade
Low	34	51	21	43	0.396
High	42	86	32	117	0.041
Number
Single	51	101	51	97	0.903
Multiple	18	43	19	46	1.000
Size
< 3	48	92	48	99	0.803
≥ 3	19	54	14	52	0.553

NR: Non recurrence; R: recurrence; PUCB: pure urothelial carcinoma of bladder; SUCB: urothelial carcinoma of the bladder with SD.