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Table 1 Demographics of the vaccinated, HBsAg-negative students enrolled

From: The long-term immunogenicity of recombinant hepatitis B virus (HBV) vaccine: contribution of universal HBV vaccination in Italy

Characteristic Value
N° of subjects 1,704
Age, years 26 ± 4.7
Females 1,033 (60.6)
Years since vaccination 17.7 ± 3.9
Place of birth: Italy 1,685 (98.9)
Elsewhere 19 (1.1)
Attending: School of medicine 525 (30.8)
Healthcare profession school 829 (48.6)
Postgraduate medical school 350 (20.6)
Vaccination conducted: in infancy 588 (34.6)
at 12 years old 1116 (65.4)
Year of vaccination: pre-1992 188 (11.0)
1992–1993 445 (26.1)
1994–1995 156 (9.2)
1996–1997 176 (10.3)
1998–1999 236 (13.8)
2000–2001 304 (17.8)
2002 199 (11.7)
HBsAb titer: <10 IU/L 270 (15.8)
10–400 IU/L 987 (57.9)
447 (26.3)
>400 IU/L
  1. Continuous variables are given as mean ± SD; categorical variables are given as n° (%).