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Table 3 Odds ratios and 95% confidence interval of breast cancer associated with viral hepatitis by age

From: Association between chronic viral hepatitis infection and breast cancer risk: a nationwide population-based case-control study

Viral hepatitis B & C Age < 50 years Age ≥ 50 years
  Cases Controls ORa (95% CI) Cases Controls ORa (95% CI)
No 910 3722 1.00 (reference) 850 3380 1.00 (reference)
HCV 24 48 2.03 (1.23-3.34)* 32 130 1.00 (0.67-1.49)
HBV 72 267 1.10 (0.84-1.45) 51 213 0.97 (0.71-1.33)
HBV + HCV 10 27 1.59 (0.77-3.31) 9 45 0.83 (0.40-1.71)
  1. aAdjusted for area, occupation, urbanization, and income
  2. *p < 0.01 based on Wald tests