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Table 3 Multivariate logistic regression analysis showing the risk of HBV infection stratified by birth date

From: Risk of HBV infection among male and female first-time blood donors born before and after the July 1986 HBV vaccination program in Taiwan

  Born before July 1986 Born after July 1986
OR (95% CI) OR (95% CI)
Sex
 Women 1 1
 Men 1.47 (1.40–1.55) 1.15 (1.02–1.29)
Age (years)
 17–29 1 1
 30–65 1.59 (1.21–2.09) 1.78 (1.29–2.46)
Blood type
 A 1 1
 B 0.97 (0.91–1.04) 0.94 (0.82–1.07)
 O 1.03 (0.97–1.09) 0.96 (0.85–1.08)
 AB 0.97 (0.87–1.08) 0.99 (0.79–1.22)
BMI (kg/m2)
  ≤ 24 1 1
  > 24 1.12 (1.07–1.18) 0.91 (0.82–1.02)
ALT (U/L) 1.01 (1.01–1.01) 1.01 (1.01–1.01)
Residential area
 Northern 1 1
 North-Central 1.13 (1.05–1.22) 1.25 (1.08–1.46)
 Central 1.40 (1.31–1.49) 0.83 (0.72–0.96)
 Central-South 1.44 (1.34–1.55) 1.17 (1.01–1.36)
 Southern 1.29 (1.20–1.39) 1.06 (0.91–1.23)
 Eastern 1.42 (1.21–1.66) 1.32 (0.99–1.76)
 Island 1.01 (0.68–1.49) 1.03 (0.55–1.93)
Occupation
 Service worker 1 1
 Student 0.45 (0.28–0.71) 0.25 (0.22–0.30)
 Military/civil servant/teacher 0.61 (0.54–0.70) 0.71 (0.60–0.85)
 Laborer/farmer and fisherman 1.02 (0.95–1.09) 1.11 (0.91–1.37)
 Business/technician/specialist 0.78 (0.72–0.85) 0.52 (0.38–0.73)
 Others (including housekeepers) 0.98 (0.92–1.05) 0.52 (0.42–0.64)
  1. Birth date*sex p-value = 0.0067