Skip to main content
. 2010 Oct;17(10):742–748. doi: 10.1111/j.1365-2893.2009.01243.x

Table 1.

Baseline characteristics of the study subjects of blood donors aged 40–64 years and incidence rates of intrahepatic cholangiocarcinoma.

N (%) ICC incident cases Person-years (×105) Incidence rate of ICC (per 105 person-years) 95% Confidence interval* of ICC incidence rate (per 105 person-years)
All cases 154 814 100.0 11 12.50 0.88 0.44–1.58
Age at blood donation (years)
40–49 90 223 58.3 2 7.29 0.27 0.03–0.99
50–54 35 308 22.8 4 2.85 1.41 0.38–3.59
55–59 20 668 13.4 4 1.67 2.40 0.64–6.13
60–64 8615 5.6 1 0.69 1.44 0.02–8.06
Sex
Male 84 205 54.4 7 6.81 1.03 0.41–2.12
Female 70 609 45.6 4 5.68 0.70 0.19–1.80
ALT (KU)
19 or lower 127 757 82.5 7 10.32 0.68 0.27–1.40
20–39 23 666 15.3 2 1.91 1.05 0.12–3.78
40 or over 3391 2.2 2 0.27 7.36 0.83–26.74
Cholesterol (mg/dL)
139 or lower 4533 2.9 0 0.37 0.00 0.00–12.60
140–199 82 575 53.3 8 6.67 1.20 0.52–2.36
200 or over 67 706 43.7 3 5.46 0.55 0.11–1.61
Hepatitis B/C virus infection
HBsAg+ 2519 1.6 2 0.22 9.08 1.02–32.82
anti-HCV+ 1927 1.2 1 0.16 6.34 0.08–34.77
All negative 150 368 97.1 8 12.12 0.66 0.28–1.30

None of the subjects was positive for human immunodeficiency virus or human T-cell lymphotropic virus type 1. All negative: tested negative for both anti-HCV and HBsAg. ALT, alanine aminotransferase; HBsAg+, tested positive for Hepatitis B surface antigen and negative for Hepatitis C virus antibody; anti-HCV+, tested positive for anti Hepatitis C virus antibody and negative for Hepatitis B surface antigen. *95% confidence interval was calculated by Byar’s approximation of the exact Poisson test.