Table 3 Characteristics of students stratified by anti-HBs titer
|  | <10 IU/L | ≥10 IU/L | P | |
|---|---|---|---|---|
N° of students | 270 | 1,434 |  | |
Age, years | 24 ± 5.18 | 26 ± 4.86 | 0.000 | |
Females | 158 (58.5) | 875 (60) | n.s | |
Attending: | School of medicine | 66 (24.4) | 459 (32) | 0.0001* |
Healthcare profession school | 159 (59) | 670 (47) | ||
Postgraduate medical school | 45 (16.6) | 305 (21) | ||
Vaccinated | in infancy | 135 (50) | 452 (31.0) | 0.000 |
at 12Â years old | 135 (50) | 982 (67.0) | ||
Year of vaccination | pre-1992 | 36 (13.0) | 153 (11.0) | n.s |
1992–1993 | 92 (34.0) | 352 (24.4) | ||
1994–1995 | 20 (7.0) | 136 (9.6) | ||
1996–1997 | 25 (10.0) | 151 (10.5) | ||
1998–1999 | 26 (10.0) | 210 (14.5) | ||
2000–2001 | 37 (14.0) | 267 (18.5) | ||
2002 | 34 (12.0) | 165 (11.5) | ||
Years from vaccination | 18.29 ± 3.97 | 17.57 ± 3.85 | 0.005 | |