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Table 1 Basic information of the first-time blood donors 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 p-value
HBV NAT    < 0.001
 Negative 156,763 (95.47) 658,162 (99.75)  
 Positive 7438 (4.53) 1680 (0.25)  
Sex    < 0.001
 Women 104,463 (63.62) 279,276 (42.32)  
 Men 59,738 (36.38) 380,566 (57.68)  
Age (years)    < 0.001
17–29 1879 (1.14) 654,886 (99.25)  
30–65 162,322 (98.86) 4956 (0.75)  
Blood type    0.683
 A 43,796 (26.67) 175,650 (26.62)  
 B 39,811 (24.25) 159,438 (24.16)  
 O 70,796 (43.12) 284,973 (43.19)  
 AB 9798 (5.97) 39,781 (6.03)  
BMI (kg/m2)    < 0.001
  ≤ 24 91,484 (55.71) 462,317 (70.06)  
  > 24 72,717 (44.29) 197,525 (29.94)  
ALT (U/L) 21.64 ± 17.80 17.77 ± 16.85 < 0.001
Residential area    < 0.001
 Northern 57,801 (35.20) 178,238 (27.01)  
 North-Central 26,669 (16.24) 99,438 (15.07)  
 Central 32,150 (19.58) 144,680 (21.93)  
 Central-South 21,879 (13.32) 105,406 (15.97)  
 Southern 21,590 (13.15) 111,239 (16.86)  
 Eastern 3387 (2.06) 17,137 (2.60)  
 Island 725 (0.44) 3704 (0.56)  
Occupation    < 0.001
 Student 846 (0.52) 419,940 (63.64)  
 Military/civil servant/teacher 9798 (5.97) 121,172 (18.36)  
 Laborer/farmer and fisherman 33,115 (20.17) 23,542 (3.57)  
 Business/technician/specialist 25,511 (15.54) 14,314 (2.17)  
 Service worker 34,911 (21.26) 37,933 (5.75)  
 Others (including housekeepers) 60,020 (36.55) 42,941 (6.51)  
  1. ALT was presented in mean ± standard deviation while the other variables were presented in n(%)