Table I.

Characteristics of smokers and non-smokers.

	Ever smokers		Never smokers		Total		Chi-square
	N	%	N	%	N	%	p-value
Total	223	100.0	221	100.0	444	100.0	0.0200
Age
≥60	94	42.2	116	52.5	210	47.3
<60	129	57.8	101	45.7	230	51.8
Missing			4	1.8	4	0.9
Gender							<0.0001
Male	198	88.8	146	66.1	344	77.5
Female	25	11.2	74	33.5	99	22.3
Missing			1	0.5	1	0.2
Race/ethnicity							0.0100
White	106	47.5	77	34.8	183	41.2
Black	29	13.0	29	13.1	58	13.1
Hispanic	67	30.0	75	33.9	142	32.0
Asian	11	4.9	29	13.1	40	9.0
Missing	10	4.5	11	5.0	21	4.7
Child-Pugh score							0.9000
A (5,6)	88	39.5	89	40.3	177	39.9
B (7–9)	63	28.3	62	28.1	125	28.2
C (10–15)	70	31.4	65	29.4	135	30.4
Missing	2	0.9	5	2.3	7	1.6
Stage							0.0600
1	66	29.6	50	22.6	116	26.1
2	64	28.7	51	23.1	115	25.9
3–5	80	35.9	100	45.2	180	40.5
Missing	13	5.8	20	9.0	33	7.4
Treatment							0.0400
Surgery	122	54.7	99	44.8	221	49.8
No surgery	101	45.3	121	54.8	222	50.0
Missing		0.0	1	0.5	1	0.2
AFP max (ng/ml)							0.0200
≥28	87	39.0	110	49.8	197	44.4
<28	121	54.3	98	44.3	219	49.3
Missing	15	6.7	13	5.9	28	6.3
HCV							0.0010
(+)	166	74.4	118	53.4	284	64.0
(−)	57	25.6	103	46.6	160	36.0
HBV							0.0300
(+)	31	13.9	48	21.7	79	17.8
(−)	192	86.1	171	77.4	363	81.8
Missing		0.0	2	0.9	2	0.5
ETOH							0.0030
(+)	73	32.7	44	19.9	117	26.4
(−)	150	67.3	174	78.7	324	73.0
Missing		0.0	3	1.4	3	0.7
Total	223	100.0
Time since smoking cessation
N/A (current smoker)	93	41.7
6 months to 20 years	79	35.4
>20 years	26	11.7
Missing	25	11.2
Pack-years
<20	52	23.3
20+	118	52.9
Unknown	53	23.8