Table 1.
Univariate and multivariate analysis of level of anti-HBsAg antibodies according to sociodemographic factors, number of doses of HBV vaccination, academic year, and type of biomedical students.
| Titers (mIU/mL) (%) | P | Crude OR (95% CI) | Adjusted OR (95% CI) | |||
|---|---|---|---|---|---|---|
| 0–9 | 10–1121.63 | >1121.64 | ||||
| Gender | ||||||
| Males | 54 (50.9) | 46 (43.4) | 6 (5.7) | 0.998 | 1 | 1 |
| Females | 132 (50.6) | 114 (43.7) | 15 (5.7) | 1.01 (0.65–1.59) | 1.11 (0.69–1.78) | |
| Age group dose 1 | ||||||
| 1–10 years | 24 (31.2) | 46 (59.7) | 7 (9.1) | 0.003 | 2.70 (1.51–4.76) | 2.44 (1.41–4.35) |
| 11–17 years | 107 (53.0) | 87 (43.1) | 8 (4.0) | 1 | 1 | |
| Age group | ||||||
| ≤20 | 88 (56.4) | 59 (37.8) | 9 (5.8) | 0.010 | 1** | 1** |
| 21–24 | 39 (37.1) | 61 (58.1) | 5 (4.8) | |||
| ≥25 | 48 (55.2) | 32 (36.8) | 7 (8.0) | 0.77 (0.47–1.25) | 1.17 (0.67–2.04) | |
| Number of doses | ||||||
| 1 | 22 (78.6) | 5 (17.9) | 1 (3.6) | 0.001* | 1 | 1 |
| 2 | 20 (71.4) | 8 (28.6) | 0 (0.0) | 1.47 (0.43–4.96) | 1.4 (0.40–4.86) | |
| 3 | 129 (46.4) | 134 (48.2) | 15 (5.4) | 4.30∧ (1.7 – 10.91) | 3.91∧ (1.44–10.57) | |
| 4 | 15 (42.9) | 15 (42.9) | 5 (14.3) | |||
| Academic year | ||||||
| 2003-2004 | 2 (100.0) | 0 (0.0) | 0 (0.0) | 0.001* | ||
| 2004-2005 | 2 (66.7) | 1 (33.3) | 0 (0.0) | |||
| 2005-2006 | 30 (78.9) | 8 (21.1) | 0 (0.0) | |||
| 2006-2007 | 140 (61.9) | 78 (34.5) | 8 (3.5) | 1 | 1 | |
| 2007-2008 | 6 (16.7) | 26 (72.2) | 4 (11.1) | 17.69° (8.5–36.97) | 17.0° (8.23–35.2) | |
| 2008-2009 | 2 (10.6) | 14 (73.7) | 3 (15.7) | |||
| 2009-2010 | 4 (8.9) | 35 (77.8) | 6 (13.3) | |||
| Type of students | ||||||
| Health Professions | 182 (50.6) | 158 (43.9) | 20 (5.6) | 0.763 | 1 | 1 |
| Medicine | 4 (44.4) | 4 (44.4) | 1 (11.2) | 0.93 (0.47–1.86) | 0.85 (0.46–1.89) | |
*Yates correction; **the reference group is age ≤24 years; ∧the OR is related to 3-4 doses versus 1 dose; °the OR is related to 2007 and over versus before 2007.