TABLE 1.

Demographics and Liver Disease Variables

Variable	n	COPD	No COPD	OR	95% CI	P Value
Age, years	373
18–47		11 (16%)	70 (23%)	1.0	—	—
48–53		13 (19%)	87 (28%)	0.95	0.40–2.25	0.91
54–59		18 (27%)	71 (23%)	1.61	0.71–3.66	0.25
60–79		25 (37%)	78 (26%)	2.03	0.94–4.45	0.07
Gender, male	373	48 (72%)	186 (61%)	1.62	0.91–2.91	0.10
Race/ethnicity	373					0.47
Non-Hispanic white		60 (90%)	233 (76%)	1.0	—	—
Hispanic white		3 (5%)	36 (12%)	0.32	0.10–1.09	0.07
Non-Hispanic black		3 (5%)	19 (6%)	0.61	0.18–2.14	0.44
Other		1 (2%)	18 (6%)	0.22	0.03–1.65	0.14
Etiology of liver disease	373
Alcohol		38 (57%)	116 (38%)	2.15	1.26–3.67	0.005
Hepatitis C infection		32 (48%)	138 (45%)	1.11	0.66–1.89	0.69
Autoimmune hepatitis		1 (2%)	12 (4%)	0.37	0.05–2.90	0.35
Nonalcoholic fatty liver disease		3 (5%)	36 (12%)	0.35	0.10–1.18	0.09
Hepatitis B infection		2 (3%)	15 (5%)	0.60	0.13–2.67	0.50
Alpha-1 antitrypsin deficiency		1 (2%)	9 (3%)	0.50	0.06–4.01	0.51
Primary sclerosing cholangitis		1 (2%)	16 (5%)	0.27	0.04–2.11	0.21
Primary biliary cirrhosis		1 (2%)	12 (4%)	0.37	0.05–2.90	0.35
Cryptogenic cirrhosis		6 (9%)	29 (9%)	0.94	0.37–2.36	0.89
MELD score	371	14 ± 5	13 ± 5	1.02	0.98–1.07	0.34

NOTE: Data are shown as mean ± standard deviation or n (%).

Abbreviations: CI, confidence interval; COPD, chronic obstructive pulmonary disease; MELD, Model for End-Stage Liver Disease; OR, odds ratio.