Table 1.

Frequency distributions of selected variables in HCC patients and control subjects, n (%)

Variable	Case (n = 100)	Control (n = 140)
Sex
Male	80 (80)	114 (81.4)
Female	20 (20)	26 (18.6)
Age (yr)	55.86 ± 10.12	57.12 ± 10.01
Smoking status
Current smoker	60 (60.0)	92 (65.7)
Former smoker	21 (21.0)	26 (18.6)
Non smoker	19 (19.0)	22 (15.7)
Pack/year	11.26 ± 6.25	14.89 ± 7.56
Alcohol consumption
Current drinker	55 (55.0)	70 (50.0)
Former drinker	19 (19.0)	29 (20.7)
Non drinker	26 (26.0)	41 (29.3)
Alcohol/year	10.01 ± 5.21	13.58 ± 5.09