Skip to main content

Table 3 Estimated coefficients of the fitted logistic regression model for seropositivity,a before and after backward elimination

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

Characteristics Saturated model Final model
OR (95% CI) p-value OR (95% CI) p-value
Age 18–29 vs. 45–59 yearsb 1.64 (1.10–2.44) .015 1.67 (1.13–2.46) .0094
Age 30–44 vs. 45–59 yearsb 1.15 (0.78–1.70) .48 1.17 (0.80–1.71) .41
Age ≥60 vs. 45–59 yearsb 2.13 (1.46–3.12) <.0001 1.97 (1.39–2.80) .0002
Male vs. female 1.29 (1.00–1.67) .050 1.30 (1.01–1.68) .041
Vaccination yes vs. no 1.46 (0.92–2.29) .11
Vaccination unknown vs. no 1.36 (0.90–2.05) .15
Pertussis yes vs. no 0.99 (0.54–1.81) .97
Pertussis unknown vs. no 0.99 (0.72–1.37) .96
Medicationc yes vs. no 1.04 (0.71–1.54) .83
Medicationc unknown vs. no 1.44 (0.62–3.33) .39
Hospitalizationd yes vs. no 3.01 (0.79–11.55) .11
Hospitalizationd unknown vs. no 1.03 (0.11–10.21) .98
Current vs. never smoker 1.36 (0.99–1.87) .055 1.38 (1.01–1.89) .045
Former vs. never smoker 1.44 (1.07–1.95) .018 1.46 (1.08–1.97) .014
  1. Abbreviations: CI confidence interval, OD optical density, OR odds ratio, vs. versus
  2. a>0.3 OD units
  3. bThe age group with the lowest seropositivity was used as the reference
  4. 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
  5. dHospitalized due to respiratory infections in the previous 12 months