Table 1.

The distributions of demographical characteristics in 561 controls and 203 patients with HCC.

Variable	Controls (N = 561)	Patients (N = 203)	P value
Age (yrs)
Mean ± S.D.	51.81 ± 14.71	64.67 ± 11.81	P < 0.001*
Gender	n (%)	n (%)
Male	457 (81.5%)	141 (69.5%)
Female	104 (18.5%)	62 (30.5%)	P = 0.001*
Alcohol consumption
No	347 (61.9%)	134 (66.0%)
Yes	214 (38.1%)	69 (34.0%)	P = 0.293
Tobacco consumption
No	341 (60.8%)	123 (60.6%)
Yes	220 (39.2%)	80 (39.4%)	P = 0.961
Stage
I + II		127 (62.6%)
III + IV		76 (37.4%)
Tumor T status
≤T2		129 (63.5%)
>T2		74 (36.5%)
Lymph node status
N0		194 (95.6%)
N1 + N2		9 (4.4%)
Metastasis
M0		192 (94.6%)
M1		11 (5.4%)

Mann-Whitney U test or Fisher's exact test was used between healthy controls and patients with HCC. *P value < 0.05 is statistically significant.