Seroprevalence of Bordetella pertussis antibodies in adults in Hungary: results of an epidemiological cross-sectional study

Table 4 Estimated coefficients of the fitted logistic regression model for increased likelihood of current/recent infection,^a before and after backward elimination

Characteristics	Saturated model		Final model
Characteristics	OR (95% CI)	p-value	OR (95% CI)	p-value
Age 18–29 vs. 45–59 years^b	0.57 (0.10–3.31)	.53	0.58 (0.11–3.24)	.54
Age 30–44 vs. 45–59 years^b	1.21 (0.31–4.74)	.79	1.21 (0.32–4.57)	.78
Age ≥60 vs. 45–59 years^b	3.60 (1.06–12.24)	.040	2.99 (0.94–9.56)	.064
Male vs. female	1.55 (0.65–3.70)	.32	–	–
Vaccination yes vs. no	2.03 (0.35–11.81)	.43	–	–
Vaccination unknown vs. no	3.31 (0.71–15.5)	.13	–	–
Pertussis yes vs. no	0.45 (0.06–3.64)	.45	–	–
Pertussis unknown vs. no	0.30 (0.08–1.08)	.065	–	–
Medication^c yes vs. no	1.24 (0.35–4.38)	.74	–	–
Medication^c unknown vs. no	2.14 (0.25–17.97)	.49	–	–
Hospitalization^d yes vs. no	0.00 (0.00–NR)	.99	–	–
Hospitalization^d unknown vs. no	0.00 (0.00–NR)	1.00	–	–
Current vs. never smoker	7.08 (2.17–23.16)	.0012	7.50 (2.32–24.31)	.0008
Former vs. never smoker	4.12 (1.21–14.01)	.024	4.07 (1.21–13.64)	.023

Abbreviations: CI confidence interval, NR not reported, OD optical density, OR odds ratio, vs. versus
^a≥1.0 OD units
^bThe age group with the lowest seropositivity was used as the reference
^cAny antibiotics and/or other medication (i.e., any cough medicines) for lower respiratory tract infections or (suspected) pertussis infections in the previous 12 months
^dHospitalized due to respiratory infections in the previous 12 months

ISSN: 1471-2334