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Table 1 Sociodemographic characteristics and comorbidities of the hepatitis C virus (HCV)-infected and HCV-uninfected control groups in Taiwan, 1998–2004 (n = 15910)

From: Hepatitis C virus itself is a causal risk factor for chronic kidney disease beyond traditional risk factors: a 6-year nationwide cohort study across Taiwan

Variables HCV-infected group (n = 3182) N (%) Control group (n = 12728) N (%) p
Gender    1.0000
 Male 1619 (50.9) 6476 (50.9)  
 Female 1563 (49.1) 6252 (49.1)  
Age (year)    1.0000
 18–39 1319 (41.5) 5276 (41.5)  
 40–49 874 (27.5) 3496 (27.5)  
 50–59 552 (17.3) 2208 (17.3)  
 60–69 315 (9.9) 1260 (9.9)  
70 122 (3.8) 488 (3.8)  
Diabetes    <0.0001
 Yes 0 (0) 981 (7.7)  
 No 3182 (100) 11747 (92.3)  
Hypertension    <0.0001
 Yes 0 (0) 1726 (13.6)  
 No 3182 (100) 11002 (86.4)  
Coronary heart disease    <0.0001
 Yes 0 (0) 838 (6.6)  
 No 3182 (100) 11890 (93.4)  
Hyperlipidemia    <0.0001
 Yes 0 (0) 1031 (8.1)  
 No 3182 (100) 11697 (91.9)  
Liver Cirrhosis    <0.0001
 Yes 0 (0) 96 (0.8)  
 No 3182 (100) 12632 (99.2)  
Geographic region    <0.0001
 Northern 1017 (32.0) 6157 (48.4)  
 Central 922 (29.0) 2916 (22.9)  
 Eastern 81 (2.5) 292 (2.3)  
 Southern 1162 (36.5) 3362 (26.4)  
Urbanization level    <0.0001
 Urban 818 (25.7) 4076 (32.0)  
 Suburban 1450 (45.6) 5891 (46.3)  
 Rural 914 (28.7) 2760 (21.7)  
Enrollee category    <0.0001
 1 1355 (42.6) 5978 (47.0)  
 2 107 (3.4) 270 (2.1)  
 3 1250 (39.3) 4367 (34.3)  
 4 470 (14.8) 2113 (16.6)  
No. of health care visits in 1 year before study entry    <0.0001
 <10 794 (25.0) 5199 (40.8)  
 11-20 974 (30.6) 3761 (29.5)  
 21-30 660 (20.7) 1977 (15.5)  
 31-40 370 (11.6) 850 (6.7)  
41 384 (12.1) 941 (7.4)