Table 3. Multiple logistic regression analysis of risk factors for ICC.
| Odds ratio | 95% CI | P-value | |
|---|---|---|---|
| HBsAg (1)a | 4.985 | 2.775–8.945 | 0.000 |
| Anti-HCV (1)a | 2.709 | 1.162–6.318 | 0.021 |
| IHD stone | 4.810 | 2.626–8.015 | 0.000 |
| Cirrhosis | —b | —b | —b |
HBsAg=seropositivity for hepatitis B surface antigen; anti-HCV=seropositivity for anti-hepatitis C virus antibody; IHD=intrahepatic duct.
a
Variable(s) entered in step 1: HBsAg, anti-HCVand IHD stones.
b
No case of liver cirrhosis was found in the control group; therefore, the odds ratio and 95% CI (confidence interval) could not be calculated.