Table 7. Logistic regression models of predictors of hepatitis B vaccination status, questionnaire completed by healthcare workers at the Clinical Centre of Serbia, December 2015 (n=352).

	Unadjusted models			Adjusted model
	OR	95% CI	p	OR	95% CI	p
Age (years)	1.05	1.02 – 1.07	< 0.001	1.00	0.96–1.04	0.989
Sex	Reference category
Female
Male	1.54	0.90–2.65	0.113
Marital status Married/cohabiting vs others
	1.15	0.73–1.81	0.540
Occupation Administrative staff, sanitary workers and othersa Physicians Nurses, medical and laboratory technologists	Reference category			Reference category
	9.78	4.14–23.13	< 0.001	3.41	1.16–10.07	0.026
	5.27	2.48–11.17	< 0.001	2.52	0.93–6.84	0.068
Work site Inpatient wards Operating theatre Accident and emergency, haemodialysis unit Specialty ward/Intensive care unit Laboratory	Reference category			Reference category
	2.45	1.41–4.23	0.001	1.43	0.73–2.79	0.293
	1.19	0.57–2.47	0.641
	2.45	1.05–5.70	0.038	2.16	0.82–5.71	0.121
	1.45	0.26–8.13	0.675
Duration of work experience (years)	0.95	0.93 – 0.97	< 0.001	0.95	0.92 – 0.99	0.011
Blood exposure in the last year None 1–5 times 6–10 times More than 10 times	Reference category			Reference category
	2.39	1.24–4.61	0.009	1.78	0.78–4.05	0.171
	5.05	2.13–11.97	< 0.001	3.67	1.30–10.40	0.014
	2.88	1.53–5.43	0.001	1.95	0.86–4.41	0.108
Sharps injuries in the last year None Once Twice More than twice	Reference category
	0.76	0.44–1.29	0.308
	1.88	0.88–4.02	0.103
	0.67	0.32–1.38	0.275
Influenza vaccinations Never Once More than once	Reference category			Reference category
	1.56	0.55–4.44	0.406
	2.78	1.04–7.49	0.042	2.74	0.93–8.07	0.067
Seat belt use frequency Never Frequent Always	Reference category			Reference category
	6.87	1.89–25.05	0.003	8.14	1.69–39.04	0.009
	5.03	1.53–14.46	0.008	4.79	1.15–19.94	0.031
Total hepatitis B-related knowledge score	1.15	1.09–1.22	< 0.001	1.10	1.03–1.17	0.008

CI: confidence interval; OR: odds ratio.

Bold values indicate statistical significance.

^a ’Others’ includes administrative staff, research scientists, sanitary workers, housekeeping, etc.