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