Table 1.

The distributions of demographical characteristics in 272 controls and 272 urothelial cell carcinoma patients.

Variable	Controls (N=272)	Patients (N=272)	p value
Age (yrs)	Mean ± S.D.	Mean ± S.D.
	67.79 ± 10.06	68.68 ± 12.06	p=0.349
Gender
Male	181 (66.5%)	179 (65.8%)
Female	91 (33.5%)	93 (34.2%)	p=0.856
Tobacco consumption
No	201 (73.9%)	196 (72.1%)
Yes	71 (26.1%)	76 (27.9%)	p=0.629
Stage
Superficial tumor (pTa-pT1)		165 (60.7%)
Invasive tumor (pT2-pT4)		107 (39.3%)
Tumor T status
T0		74 (27.2%)
T1-T4		198 (72.8%)
Lymph node status
N0		244 (89.7%)
N1+N2		28 (10.3%)
Metastasis
M0		268 (98.5%)
M1		4 (1.5%)
Histopathologic grading
Low grade		39 (14.3%)
High grade		233 (85.7%)

Mann-Whitney U test or Fisher's exact test was used between controls and urothelial cell carcinoma patients.