Table 3.

Bivariate and multivariate analyses of some factors associated with seroconversion status among HCWs.

Variable	Crude odds ratio	95% CI	Adjusted odds ratio	95% CI
Age, years (N  = 424)
<20	Reference
20–29	2.76	0.64–11.95	2.86	0.66–12.43
30–39	1.47	0.33–6.49	1.49	0.34–6.58
≥40	0.27	0.04–1.75	0.28	0.04–1.78
Sex
Female	Reference
Male	1.04	0.68–1.59	0.90	0.58–1.40
Location HBV was administered
Hospital	Reference
School	1.26	0.83–1.92	0.91	0.57–1.45
Other	0.89	0.32–2.69	1.16	0.38–4.03
Who administered HBV
Nurse or doctor	Reference
Medical laboratory scientist	0.96	0.60–1.53	1.09	0.61–1.95
Other	1.00	0.31–3.84	1.17	0.34–4.71
Don't remember	0.73	0.42–1.29	0.73	0.42–1.29
Route of administration
Intramuscular	Reference
Subcutaneous	0.82	0.36–1.99	1.04	0.36–3.07
Do not know	0.74	0.40–1.41	0.64	0.34–1.31
Number of doses received
2	Reference
3	3.73	1.95–7.34	3.86	1.99–7.37
Years since last vaccination
<1	Reference
1–4	0.26	0.10–0.74	0.24	0.08–0.61
5–10	0.24	0.09–0.66	0.24	0.09–0.66
>10	0.15	0.04–0.70	0.15	0.04–0.70
Booster taken
No	Reference
Yes	4.12	1.41–17.56	4.09	1.38–17.57
Had vaccination record card
Yes	Reference
No	0.52	0.34–0.79	0.57	0.38–0.81

CI, confidence interval; crude odds ratios and adjusted odds ratios significantly higher or lower than 1 are shown in bold.